About this recording 481–7 President Richard M. Nixon Alexander P. Butterfield White House operator H. R. Haldeman Stephen B. Bull James D. Hodgson Jeanne Ehrlichman Bertha Denny Henry Ahlgram April 17, 1971 Alexander P. Butterfield White House Operator H. R. Haldeman Stephen B. Bull James D. Hodgson Bertha Denny Henry Ahlgram Richard M. Nixon John D. Ehrlichman Secret White House Tapes | Richard M. Nixon Presidency 481–7 Backward Play Stop Forward Download audio Previous 250–9 Next 1–139 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 1–139 audio icon 1–140 audio icon 1–141 audio icon 1–142 audio icon 1–143 audio icon 1–144 audio icon 1–145 audio icon 1–146 audio icon 1–147 audio icon 1–148 audio icon