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Sikorsky S-31 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Sikorsky S-31" in English language version.

refsWebsite
Global rank English rank
1worldcat.org
5th place
5th place

worldcat.org (Global: 5th place; English: 5th place)

search.worldcat.org

  • Best, Martin (1990). "Sikorsky American Fixed-Wing Aircraft - Part 1 S-29A to S-35". Archive. 2002 (4). Air-Britain: 127–133. ISSN 0262-4923.