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 Backward Play Stop Forward Download audio Previous 16–102 Next 310–1 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 310–1 audio icon 639–1 audio icon 310–10 audio icon 639–10 audio icon 16–106 audio icon 16–107 audio icon 16–108 audio icon 16–109 audio icon 639–11 audio icon 310–11 audio icon