David Kahn, Hitler's Spies: German Military Intelligence in World War II, New York: Macmillan, 1978, ISBN978-0-02-560610-4; repr. Cambridge, Massachusetts: Da Capo, 2000, ISBN978-0-306-80949-1, p. 115 states that he was from Göttingen. However, according to Veit Scherzer, Die Ritterkreuzträger 1939–1945: Die Inhaber des Eisernen Kreuzes von Heer, Luftwaffe, Kriegsmarine, Waffen-SS, Volkssturm sowie mit Deutschland verbündete Streitkräfte nach den Unterlagen des Bundesarchivs, Jena: Ranis/Scherzerg, 2007, ISBN978-3-938845-17-2, p. 642 (in German), he was born in Barstede, part of Ihlow.
Roderich Cescotti, Kampfflugzeuge und Aufklärer: Entwicklung, Produktion, Einsatz und zeitgeschichtliche Rahmenbedingungen von 1935 bis heute, Deutsche Luftfahrt 15, Koblenz: Bernard & Graefe, 1989, ISBN978-3-7637-5293-5, p. 100(in German)
Roy Godson and James J. Wirtz, Strategic Denial and Deception: The Twenty-First Century Challenge, New Brunswick, New Jersey: Transaction, 2002, ISBN978-0-7658-0113-5, p. 61.
Barton Whaley, Covert German Rearmament, 1919–1939: Deception and Misperception, Foreign Intelligence Book Series, Frederick, Maryland: University Publications of America, 1984, ISBN978-0-89093-542-2, p. 43: "[When Conrad Patzig [de] was appointed head of the Abwehr on 7 June 1932], its strategic aerial photoreconnaissance was still little more than Theodor Rowehl's one-man show."
Franz Kurowski, Deutsche Kommandotrupps 1939–1945: "Brandenburger" und Abwehr im weltweiten Einsatz, volume 1 Stuttgart: Motorbuch, 2000, ISBN978-3-613-02018-4, p. 32(in German)
Walther-Peer Fellgiebel, Elite of the Third Reich: The Recipients of the Knight's Cross of the Iron Cross 1939–45: An Illustrated Reference, translated, Solihull: Helion, 2003, ISBN978-1-874622-46-8, p. 297.
Barton Whaley, Covert German Rearmament, 1919–1939: Deception and Misperception, Foreign Intelligence Book Series, Frederick, Maryland: University Publications of America, 1984, ISBN978-0-89093-542-2, p. 43: "[When Conrad Patzig [de] was appointed head of the Abwehr on 7 June 1932], its strategic aerial photoreconnaissance was still little more than Theodor Rowehl's one-man show."