Soyuz 18a (Vietnamese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Soyuz 18a" in Vietnamese language version.

refsWebsite

Global rank Vietnamese rank

1astronautix.com

2,056^th place

1,898^th place

6^th place

4^th place

archive.org

Clark, Phillip (1988). The Soviet Manned Space Program. New York: Orion Books, a division of Crown Publishers, Inc. ISBN 0-517-56954-X.

astronautix.com

Mark Wade. “Baikonur LC1”. Encyclopedia Astronautica. Truy cập ngày 11 tháng 10 năm 2018.