On September 20, 1971, Stephen B. Bull met with an unknown person(s) in the Oval Office of the White House at an unknown time between 12:01 pm to 12:10 pm. The Oval Office taping system captured this recording, which is known as Conversation 576-016 of the White House Tapes.
- Parte de White House Tapes: Sound Recordings of Meetings and Telephone Conversations of the Nixon Administration, Oval Office Sound Recordings