Viking program (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Viking program" in Simple English language version.

Last modified: 21:22:29, 20 September 2025 (UTC)

Ref.Un. Ref.Website

Global rank Simple English rank

12^th place

39^th place

11web.archive.org

1^st place

1^st place

nasa.gov (Global: 12^th place; Simple English: 39^th place)

jpl.nasa.gov

Nelson, Jon. "Viking 1". NASA. Retrieved February 2, 2014.
Nelson, Jon. "Viking 2". NASA. Retrieved February 2, 2014.

nssdc.gsfc.nasa.gov

David R. Williams (2006-12-18). "Viking Mission to Mars". NASA. Archived from the original on 2017-02-21. Retrieved 2011-10-27.

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

David R. Williams (2006-12-18). "Viking Mission to Mars". NASA. Archived from the original on 2017-02-21. Retrieved 2011-10-27.