Sources:
"A Man Called Lucy." Intelligence Analysis and Reporting. 24 May 2011. Web. 15 Jan. 2016. <http://spyinggame.me/2011/05/24/a-man-called-lucy-by-pierre-accoce-1966/>.
Brown, Paul. "Report on the IRR File on The Red Orchestra." National Archives and Records Administration. National Archives and Records Administration. Web. 15 Jan. 2016.
"Rudolf Roessler." Biographies.net. STANDS4 LLC, 2016. Web. 14 Jan. 2016. <http://www.biographies.net/people//en/rudolf_roessler>.
"Rudolf Roessler." - Awesomely Interesting Facts, Images & Videos. Web. 15 Jan. 2016. <http://sussle.org/t/Rudolf_Roessler>.
"Rudolf Roessler." Rudolf Roessler. Web. 15 Jan. 2016.
<http://memim.com/rudolf-roessler.html>.
"Stealing Secrets, Telling Lies." Project MUSE -. Web. 15 Jan. 2016.
"The Rote Drei: Getting Behind the 'Lucy' Myth." Central Intelligence Agency. Central Intelligence Agency, 4 Aug. 2011. Web. 15 Jan. 2016.