Марс 2 (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Марс 2" in Bulgarian language version.

refsWebsite

Global rank Bulgarian rank

6^th place

11^th place

75^th place

62^nd place

1web.archive.org

1^st place

1^st place

archive.org

Pyle, Rod. Destination Mars. Prometheus Books, 2012. ISBN 978-1-61614-589-7. с. 73 – 78'.

nasa.gov

history.nasa.gov

Perminov, V.G. The Difficult Road to Mars – A Brief History of Mars Exploration in the Soviet Union. NASA Headquarters History Division, July 1999. ISBN 0-16-058859-6. с. 34 – 60. Архив на оригинала от 2017-01-18 в Wayback Machine.

web.archive.org

Perminov, V.G. The Difficult Road to Mars – A Brief History of Mars Exploration in the Soviet Union. NASA Headquarters History Division, July 1999. ISBN 0-16-058859-6. с. 34 – 60. Архив на оригинала от 2017-01-18 в Wayback Machine.