Robert Zubrin (English Wikipedia)

Zubrin, Robert; Baker, David; Gwynne, Owen (January 7, 1991). Mars direct – A simple, robust, and cost effective architecture for the Space Exploration Initiative. 29th Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics. doi:10.2514/6.1991-329. Archived from the original on October 1, 2021. Retrieved October 1, 2021.

broadcastermagazine.com (Global: low place; English: low place)

"National Geographic Channel to Air New Event Series". Broadcast. November 3, 2016. Archived from the original on November 4, 2016. Retrieved November 3, 2016.

canadianmanufacturing.com (Global: low place; English: low place)

"Aerospace engineer bets on space tech to cash in on gas flaring". canadianmanufacturing.com. September 16, 2014. Archived from the original on September 19, 2016. Retrieved September 18, 2016.

cbc.ca (Global: 110^th place; English: 65^th place)

"The Mars Underground". CBC News. September 4, 2010. Archived from the original on October 26, 2012. Retrieved August 23, 2015.

doi.org (Global: 2^nd place; English: 2^nd place)

Zubrin, Robert; Baker, David; Gwynne, Owen (January 7, 1991). Mars direct – A simple, robust, and cost effective architecture for the Space Exploration Initiative. 29th Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics. doi:10.2514/6.1991-329. Archived from the original on October 1, 2021. Retrieved October 1, 2021.

frankblack.net (Global: low place; English: low place)

"Robert Onion". discopedia. Frank Black. Archived from the original on September 26, 2007. Retrieved July 14, 2013.

ghostarchive.org (Global: 64^th place; English: 28^th place)

Armstrong, Ari (June 4, 2019). Robert Zubrin on the Case for Space. Self in Society #1. Archived from the original on December 11, 2021. Retrieved June 27, 2019 – via YouTube.

globalsecurity.org (Global: 540^th place; English: 541^st place)

"Pathfinder – Pioneer Rocketplane". globalsecurity.org. Archived from the original on August 24, 2021. Retrieved September 24, 2021.

mentalfloss.com (Global: 2,030^th place; English: 1,242^nd place)

The Case for Mars (music video). Symphony of Science. June 8, 2010. Archived from the original on October 7, 2021. Retrieved October 7, 2021 – via mentalfloss.com.

nasa.gov (Global: 12^th place; English: 73^rd place)

quest.nasa.gov

"Robert Zubrin". NASA. Archived from the original on March 6, 2012. Retrieved July 14, 2013.

patents.google.com (Global: 1,154^th place; English: 606^th place)

US3652091A, Zubrin, Robert, "Three player chess board", issued March 28, 1972

penguin.de (Global: low place; English: low place)

Burckhardt, Martin (2015). Score (Book) (in German). Knaus (published February 9, 2015). ISBN 978-3-641-15640-4. Retrieved July 30, 2023.

pioneerastro.com (Global: low place; English: low place)

"Robert Zubrin". Pioneer Astronautics. Archived from the original on February 20, 2014. Retrieved July 14, 2013.
"About Us". Pioneer Astronautics. Retrieved August 9, 2023.
"Pioneer Astronautics Research and Development Contract List". Pioneer Astronautics. Retrieved August 9, 2023.

reddit.com (Global: 1,712^th place; English: 1,373^rd place)

joshbernhard (June 19, 2016). "'Pioneer One', the indie sci-fi drama, was released on BitTorrent 6 years ago. Now we have a shot at a big-budget reboot!". Reddit. Retrieved February 11, 2025.

ricochet.com (Global: low place; English: low place)

"Charles Zubrin – American life". ricochet.com. June 9, 2016. 342127. Archived from the original on July 18, 2022. Retrieved May 24, 2020.

spacedaily.com (Global: 8,383^rd place; English: 7,001^st place)

Zubrin, Robert (April 21, 2005). "Getting Space Exploration Right". Space Daily (Press release). Archived from the original on March 15, 2012. Retrieved July 14, 2013.

spacegrant.org (Global: low place; English: low place)

"Mckay". National Space Grant Foundation. Retrieved July 20, 2022.

spacenews.com (Global: 1,465^th place; English: 1,000^th place)

dev.spacenews.com

"Op-Ed by Robert Zubrin: U.S. Space Supremacy Now Critical". Space News. January 22, 2015. Retrieved December 8, 2023.

spacenews.com

"Voyager Space Holdings announces acquisition of Pioneer Astronautics". SpaceNews. July 13, 2020. Retrieved October 16, 2023.

taemag.com (Global: low place; English: low place)

"An Energy Revolution". The American Enterprise (online ed.). October 29, 2006. Archived from the original on October 29, 2006. Retrieved September 13, 2021.

thenewatlantis.com (Global: low place; English: low place)

Zubrin, Robert (March 25, 2006). "Getting space exploration right". The New Atlantis. Archived from the original on March 25, 2006. Retrieved September 13, 2021.

twitter.com (Global: 43^rd place; English: 43^rd place)

@robert_zubrin (April 9, 2019). "Today is my birthday. Hope gave me ..." (Tweet) – via Twitter.

washingtontimes.com (Global: 1,359^th place; English: 789^th place)

Zubrin, Robert (September 13, 2014). "Iran is 10 months away from the A-bomb". The Washington Times. Archived from the original on April 3, 2016. Retrieved March 21, 2016.

web.archive.org (Global: 1^st place; English: 1^st place)

Zubrin, Robert (April 21, 2005). "Getting Space Exploration Right". Space Daily (Press release). Archived from the original on March 15, 2012. Retrieved July 14, 2013.
"Charles Zubrin – American life". ricochet.com. June 9, 2016. 342127. Archived from the original on July 18, 2022. Retrieved May 24, 2020.
"Robert Zubrin". NASA. Archived from the original on March 6, 2012. Retrieved July 14, 2013.
"Robert Zubrin". Pioneer Astronautics. Archived from the original on February 20, 2014. Retrieved July 14, 2013.
Zubrin, Robert (September 13, 2014). "Iran is 10 months away from the A-bomb". The Washington Times. Archived from the original on April 3, 2016. Retrieved March 21, 2016.
"Pathfinder – Pioneer Rocketplane". globalsecurity.org. Archived from the original on August 24, 2021. Retrieved September 24, 2021.
"Aerospace engineer bets on space tech to cash in on gas flaring". canadianmanufacturing.com. September 16, 2014. Archived from the original on September 19, 2016. Retrieved September 18, 2016.
"The Mars Underground". CBC News. September 4, 2010. Archived from the original on October 26, 2012. Retrieved August 23, 2015.
"Robert Onion". discopedia. Frank Black. Archived from the original on September 26, 2007. Retrieved July 14, 2013.
The Case for Mars (music video). Symphony of Science. June 8, 2010. Archived from the original on October 7, 2021. Retrieved October 7, 2021 – via mentalfloss.com.
"National Geographic Channel to Air New Event Series". Broadcast. November 3, 2016. Archived from the original on November 4, 2016. Retrieved November 3, 2016.
Zubrin, Robert; Baker, David; Gwynne, Owen (January 7, 1991). Mars direct – A simple, robust, and cost effective architecture for the Space Exploration Initiative. 29th Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics. doi:10.2514/6.1991-329. Archived from the original on October 1, 2021. Retrieved October 1, 2021.
Zubrin, Robert (March 25, 2006). "Getting space exploration right". The New Atlantis. Archived from the original on March 25, 2006. Retrieved September 13, 2021.
"An Energy Revolution". The American Enterprise (online ed.). October 29, 2006. Archived from the original on October 29, 2006. Retrieved September 13, 2021.

youtube.com (Global: 13^th place; English: 14^th place)

Armstrong, Ari (June 4, 2019). Robert Zubrin on the Case for Space. Self in Society #1. Archived from the original on December 11, 2021. Retrieved June 27, 2019 – via YouTube.

Robert Zubrin (English Wikipedia)

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ghostarchive.org (Global: 64^th place; English: 28^th place)

globalsecurity.org (Global: 540^th place; English: 541^st place)

mentalfloss.com (Global: 2,030^th place; English: 1,242^nd place)

nasa.gov (Global: 12^th place; English: 73^rd place)

patents.google.com (Global: 1,154^th place; English: 606^th place)

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spacedaily.com (Global: 8,383^rd place; English: 7,001^st place)

spacenews.com (Global: 1,465^th place; English: 1,000^th place)

twitter.com (Global: 43^rd place; English: 43^rd place)

washingtontimes.com (Global: 1,359^th place; English: 789^th place)

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