About this recording 638-13 President Richard M. Nixon Alexander P. Butterfield UNKNOWN Charles W. Colson John D. Ehrlichman Stephen B. Bull December 15, 1971 Alexander P. Butterfield Unknown Charles W. Colson Stephen B. Bull Richard M. Nixon John D. Ehrlichman Secret White House Tapes | Richard M. Nixon Presidency 638-13 Rewind 10 seconds Play/Pause Fast-forward 10 seconds 0:00 Download audio Previous 949–9 Next 450–1 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 450–1 audio icon 47–1 audio icon 450–10 audio icon 450–11 audio icon 450–12 audio icon 450–13 audio icon 450–14 audio icon 450–15 audio icon 450–16 audio icon 450–17 audio icon