OP-20-G (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "OP-20-G" in English language version.

refsWebsite

Global rank English rank

6^th place

6^th place

1,079^th place

789^th place

archive.org

Clausen 1992, pp. 45, 307, 308. Clausen, Henry C. (1992). Pearl Harbor: Final Judgement. New York: Crown Publishers. ISBN 0-517-58644-4.
Layton 1985, pp. 367, 368. Layton, Edwin (1985). "And I Was There": Pearl Harbor and Midway – Breaking the Secrets. New York: William Morrow. ISBN 0-688-04883-8.

ibiblio.org

Parker, Frederick D. A Priceless Advantage: U.S. Navy Communications Intelligence and the Battles of Coral Sea, Midway, and the Aleutians. Fort Meade MD: Center for Cryptologic History, National Security Agency, 1993.