Countdown to Final Crisis (English Wikipedia)

DiDio, Dan (2007-07-05). "DC Nation #68". DC Comics. Retrieved 2008-01-17.
"DCU | Graphic Novels". Dccomics.com. 2010-04-21. Archived from the original on 2011-05-05. Retrieved 2011-04-19.
"DCU | Graphic Novels". Dccomics.com. 2010-04-21. Retrieved 2011-04-19.
"DCU | Graphic Novels". Dccomics.com. 2010-04-21. Retrieved 2011-04-19.
"DCU | Graphic Novels". Dccomics.com. 2010-04-21. Retrieved 2011-04-19.

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

"Countdown audio book by GraphicAudio". Archived from the original on 2012-05-03.

ign.com (Global: 53^rd place; English: 44^th place)

"The Worst Comic Book Events". 14 June 2011.

insidepulse.com (Global: 9,661^st place; English: 5,838^th place)

Scherl, Grey (21 June 2010). "The Weekend Top 10: Retcons". Comic Nexus. Inside Pulse. Retrieved June 13, 2013.

newsarama.com (Global: 1,155^th place; English: 745^th place)

forum.newsarama.com

"Counting Down: Dan DiDio and Mike Marts on DC's New Weekly Series". Newsarama. 2007-02-20. Archived from the original on 2007-05-22. Retrieved 2007-06-30.
"Newsarama.com: DAN DIDIO, GEOFF JOHNS ON DC UNIVERSE #0 & FINAL CRISIS' PLAN". newsarama.com. Archived from the original on August 21, 2010. Retrieved 2011-02-04.
"Talking to Dan DiDio 2007, Part Two". Newsarama. 21 December 2007. Archived from the original on 3 February 2009.
"Newsarama.com: WW: CHICAGO '07: DAN DIDIO ON COUNTDOWN: ARENA". Forum.newsarama.com. Archived from the original on 2007-10-11. Retrieved 2011-02-04.
"NYCC 07: DC's Countdown Pin-centive". Newsarama. 2007-02-22. Archived from the original on 2007-04-03. Retrieved 2007-06-30.
"Newsarama.Com: Dan Didio Comes Clean On The Countdown Teaser Image". Forum.newsarama.com. 2007-06-29. Archived from the original on 2010-06-22. Retrieved 2011-02-04.

newsarama.com

Newsarama.com: SDCC '07: DC's 'COUNTDOWN...TO THE END?' PANEL Archived August 29, 2007, at the Wayback Machine
"Interview with Final Crisis author Grant Morrison". Archived from the original on September 6, 2008.
"SDCC '07: bill willingham on salvation run". Newsarama.com. Archived from the original on 2007-09-29. Retrieved 2007-08-03.
Newsarama.com: Large Teaser Image Archived October 15, 2007, at the Wayback Machine
Huxford, Kevin (2007-02-24). "NYCC '07: DC Nation Panel". Newsarama. Archived from the original on 2007-03-18. Retrieved 2007-06-30.
Newsarama.com: DC's SECOND COUNTDOWN TEASER IMAGE: HIGH RESOLUTION Archived July 5, 2007, at the Wayback Machine

readrant.wordpress.com (Global: low place; English: low place)

"Dan DiDio Answers Mark Waid's Remarks About "52"". Readrant.wordpress.com. 2009-05-15. Archived from the original on 2010-11-27. Retrieved 2011-02-04.

warnerbros.com (Global: 1,899^th place; English: 1,237^th place)

dcboards.warnerbros.com

"DC Comics Message Boards: CAPTAIN CARROT AND THE FINAL ARK! No. 3 On Sale Wed., Dec. 12!". Warner Bros. Archived from the original on 2011-05-26. Retrieved 2011-02-04.

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

Purdin, Rickey (2007-02-20). "Countdown: DC unleashes its next weekly comic event, and head writer Paul Dini gives Wizard the exclusive scoop!". Wizard Universe. Archived from the original on 2007-06-21. Retrieved 2007-06-30.
"Counting Down: Dan DiDio and Mike Marts on DC's New Weekly Series". Newsarama. 2007-02-20. Archived from the original on 2007-05-22. Retrieved 2007-06-30.
Newsarama.com: SDCC '07: DC's 'COUNTDOWN...TO THE END?' PANEL Archived August 29, 2007, at the Wayback Machine
"Newsarama.com: DAN DIDIO, GEOFF JOHNS ON DC UNIVERSE #0 & FINAL CRISIS' PLAN". newsarama.com. Archived from the original on August 21, 2010. Retrieved 2011-02-04.
"Interview with Final Crisis author Grant Morrison". Archived from the original on September 6, 2008.
"Dan DiDio Answers Mark Waid's Remarks About "52"". Readrant.wordpress.com. 2009-05-15. Archived from the original on 2010-11-27. Retrieved 2011-02-04.
"SDCC '07: bill willingham on salvation run". Newsarama.com. Archived from the original on 2007-09-29. Retrieved 2007-08-03.
"Talking to Dan DiDio 2007, Part Two". Newsarama. 21 December 2007. Archived from the original on 3 February 2009.
"DC Comics Message Boards: CAPTAIN CARROT AND THE FINAL ARK! No. 3 On Sale Wed., Dec. 12!". Warner Bros. Archived from the original on 2011-05-26. Retrieved 2011-02-04.
"Newsarama.com: WW: CHICAGO '07: DAN DIDIO ON COUNTDOWN: ARENA". Forum.newsarama.com. Archived from the original on 2007-10-11. Retrieved 2011-02-04.
Forbidden Planet International: Lord Havok and the Extremists #6
"NYCC 07: DC's Countdown Pin-centive". Newsarama. 2007-02-22. Archived from the original on 2007-04-03. Retrieved 2007-06-30.
Newsarama.com: Large Teaser Image Archived October 15, 2007, at the Wayback Machine
Huxford, Kevin (2007-02-24). "NYCC '07: DC Nation Panel". Newsarama. Archived from the original on 2007-03-18. Retrieved 2007-06-30.
"Newsarama.Com: Dan Didio Comes Clean On The Countdown Teaser Image". Forum.newsarama.com. 2007-06-29. Archived from the original on 2010-06-22. Retrieved 2011-02-04.
Newsarama.com: DC's SECOND COUNTDOWN TEASER IMAGE: HIGH RESOLUTION Archived July 5, 2007, at the Wayback Machine
"May 2007 Comic Book orders from Diamond Comic Distributors". Archived from the original on October 28, 2007.
"July 2007 Comic Book orders from Diamond Comic Distributors". Archived from the original on October 25, 2007.
"August 2007 Comic Book orders from Diamond Comic Distributors". Archived from the original on October 22, 2007.
"September 2007 Comic Book orders from Diamond Comic Distributors". Archived from the original on October 28, 2007.
"Estimates for comics sold by Diamond in February 2008". Archived from the original on March 24, 2008.
"Countdown audio book by GraphicAudio". Archived from the original on 2012-05-03.
"DCU | Graphic Novels". Dccomics.com. 2010-04-21. Archived from the original on 2011-05-05. Retrieved 2011-04-19.

wizarduniverse.com (Global: 9,897^th place; English: 6,773^rd place)

Purdin, Rickey (2007-02-20). "Countdown: DC unleashes its next weekly comic event, and head writer Paul Dini gives Wizard the exclusive scoop!". Wizard Universe. Archived from the original on 2007-06-21. Retrieved 2007-06-30.

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Jimenez, Phil (2008). "Extremists, The". In Dougall, Alastair (ed.). The DC Comics Encyclopedia. New York: Dorling Kindersley. p. 117. ISBN 978-0-7566-4119-1. OCLC 213309017.

Countdown to Final Crisis (English Wikipedia)

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forum.newsarama.com

newsarama.com

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comicbookresources.com (Global: 991^st place; English: 656^th place)

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

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worldcat.org (Global: 5^th place; English: 5^th place)