About this recording 483–20 Alexander P. Butterfield UNKNOWN April 20, 1971 Alexander P. Butterfield Unknown Secret White House Tapes | Richard M. Nixon Presidency 483–20 Backward Play Stop Forward Download audio Previous 482–9 Next 485–1 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 485–1 audio icon 252–1 audio icon 484–1 audio icon 252–10 audio icon 484–10 audio icon 252–11 audio icon 484–11 audio icon 252–12 audio icon 484–12 audio icon 252–13 audio icon