Kosmos 21 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Kosmos 21" in English language version.

refsWebsite

Global rank English rank

75^th place

83^rd place

70^th place

63^rd place

1planet4589.org

8,665^th place

6,411^th place

loc.gov

lccn.loc.gov

Siddiqi, Asif A. (2018). Beyond Earth: A Chronicle of Deep Space Exploration, 1958–2016 (PDF). The NASA history series (second ed.). Washington, D.C.: NASA History Program Office. pp. 54–55. ISBN 9781626830424. LCCN 2017059404. SP2018-4041.

nasa.gov

nssdc.gsfc.nasa.gov

https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1963-044A - 27 February 2020
https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1963-044A - 27 February 2020

nasa.gov

Siddiqi, Asif A. (2018). Beyond Earth: A Chronicle of Deep Space Exploration, 1958–2016 (PDF). The NASA history series (second ed.). Washington, D.C.: NASA History Program Office. pp. 54–55. ISBN 9781626830424. LCCN 2017059404. SP2018-4041.

planet4589.org

McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 10 January 2011.