About this recording 23–51 President Richard M. Nixon White House operator April 20, 1972 White House Operator Richard M. Nixon Conversation No. 23-51 Date: April 20, 1972 Time: Unknown between 1:10 and 2:46 pm Location: White House Telephone The President talked with the White House operator. Request for a call to Ronald L. Ziegler 40 NIXON PRESIDENTIAL MATERIALS STAFF Tape Subject Log (rev. 1/13) Secret White House Tapes | Richard M. Nixon Presidency 23–51 Backward Play Stop Forward Download audio Previous 23–46 Next 334–1 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 334–1 audio icon 334–2 audio icon 332–22 audio icon 332–23 audio icon 332–24 audio icon 332–25 audio icon 332–26 audio icon 332–27 audio icon 332–28 audio icon 332–29 audio icon