Operation Elster (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Operation Elster" in English language version.

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9books.google.com

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archive.org

Joseph E. Persico. Roosevelt's Secret War: FDR and World War II Espionage. Random House; 2002. ISBN 978-0-375-76126-3.
Jay Robert Nash. Spies: A Narrative Encyclopedia of Dirty Tricks and Double Dealing from Biblical Times to Today. M. Evans; 28 October 1997. ISBN 978-1-4617-4770-3. p. 238–.

books.google.com

David Kahn. Hitler's Spies: German Military Intelligence In World War II. Perseus Books Group; 14 July 2000. ISBN 978-0-306-80949-1. p. 20–.
Mimi Clark Gronlund (1 January 2010). Supreme Court Justice Tom C. Clark: A Life of Service. University of Texas Press. pp. 108–. ISBN 978-0-292-77914-3.
Francis MacDonnell (2 November 1995). Insidious Foes: The Axis Fifth Column and the American Home Front. Oxford University Press. pp. 153–. ISBN 978-0-19-987991-5.
Robert A. Miller. A True Story of An American Nazi Spy: William Curtis Colepaugh. Trafford Publishing; 27 February 2013. ISBN 978-1-4669-8219-2. p. 97–.
Jefferson Adams (1 September 2009). Historical Dictionary of German Intelligence. Scarecrow Press. pp. 138–. ISBN 978-0-8108-6320-0.
Michael Dobbs (18 December 2007). Saboteurs: The Nazi Raid on America. Knopf Doubleday Publishing Group. p. 119. ISBN 978-0-307-42755-7.
Christopher Vasey (27 June 2016). Nazi Intelligence Operations in Non-Occupied Territories: Espionage Efforts in the United States, Britain, South America and Southern Africa. McFarland. pp. 125–. ISBN 978-1-4766-2458-7.
"The air-raid warden was a spy: and other tales from home-front America in World War II", William B. Breuer. John Wiley and Sons, 2003. ISBN 0-471-23488-5, ISBN 978-0-471-23488-3. p. 174-176
Erich Gimpel; Will Berthold (1957). Spy for Germany. Hale. ISBN 9780312986117.

fas.org

"Counterintelligence In World War II". FAS.org. Federation of American Scientists. Retrieved 21 July 2017.

ibiblio.org

Office of Chief of Naval Operations; Riheldaffer, John L. "Report on the Interrogation of German Agents, Gimpel and Colepaugh, Landed on the Coast of Maine from U-1230, dated 13 January 1945". ibiblio.org. US Navy. Retrieved 24 July 2017.

latimes.com

"Mary Forni, 91; spotted 2 spies left by Nazi U-boat". Los Angeles Times. Associated Press. December 3, 2006. Retrieved 18 July 2017.

nps.gov

npgallery.nps.gov

"NRHP nomination for Nazi Spy Landing Site". National Park Service. Retrieved 2015-03-11.
"National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.

usatoday.com

Willing, Richard (February 27, 2002). "The Nazi spy next door". USA Today. Retrieved August 31, 2016.