- Crosby Lewis Requests Background Information on Gehlen and Others (10/25/45) [pdf]
- Eric Waldman on the US Army's Trusteeship of the Gehlen Organization during the Years 1945-1949 (9/30/69) [pdf]
- General Gehlen’s Statement Regarding Plans After Germany’s Defeat (undated) [pdf]
- Gerhard Wessel’s Statement on the Development of the Post-War German Intelligence Organization (undated) [pdf]
- General Winter on the History of the Organization (undated) [pdf]
- German Techniques in Combating Soviet Intelligence (6/3/46) [pdf]
- Hans Hinrichs on the Early History of the Organization (undated) [pdf]
- Heinz Danko Herre’s Account of End of World War II (4/8/53) [pdf]
- Interrogation Reports (8/29/45) [pdf]
- Interview with General Edwin L. Sibert on the Gehlen Organization Report (3/26/70) [pdf]
- Lt. Col. Gerald Duin Statement on Early Contacts with Gehlen (undated) [pdf]
- “Notes on the Red Army” (6/24/45) [pdf]
- Present Usefulness of Operation Rusty (10/16/46) [pdf]
- “Operation of the Blue House Project” (5/11/46) [pdf]
- Operation Keystone (9/9/46) [pdf]
- Operation Keystone — Report by Crosby Lewis (9/22/46) [pdf]
- Operation Rusty (7/2/46) [pdf]
- “Operation Rusty — Use of the Eastern Branch of the Former German Intelligence Service” (10/1/46) [pdf]
- “Russian Experts of German Intelligence Service” (1/8/46) [pdf]
- U.S. Army Intelligence Makes Initial Contact with Gehlen (5/1/52) [pdf]
Sources: National Security Archives