About this recording 903–18 President Richard M. Nixon UNKNOWN April 20, 1973 Unknown Richard M. Nixon Conversation No. 903-18 -Book The unknown man left at an unknown time before 12:15 pm. Secret White House Tapes | Richard M. Nixon Presidency 903–18 Backward Play Stop Forward Download audio Previous 902-9 Next 38–132 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 38–132 audio icon 38–133 audio icon 430-1 audio icon 904–1 audio icon 430-10 audio icon 904–10 audio icon 904–11 audio icon 430-11 audio icon 430-12 audio icon 430-13 audio icon