Soyuz 7K-L1 No.4L (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Soyuz 7K-L1 No.4L" in English language version.

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astronautix.com

Wade, Mark. "Soyuz 7K-L1". Encyclopedia Astronautica. Archived from the original on 16 May 2010. Retrieved 27 July 2010.
Wade, Mark. "Proton". Encyclopedia Astronautica. Archived from the original on September 13, 2008. Retrieved 27 July 2010.

Williams, David R. (6 January 2005). "Tentatively Identified Missions and Launch Failures". NASA NSSDC. Retrieved 30 July 2010.

McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 27 July 2010.

Wade, Mark. "Soyuz 7K-L1". Encyclopedia Astronautica. Archived from the original on 16 May 2010. Retrieved 27 July 2010.
Wade, Mark. "Proton". Encyclopedia Astronautica. Archived from the original on September 13, 2008. Retrieved 27 July 2010.