White House, “Minutes of Meeting of January 30, 1964,” [The President’s Foreign Intelligence Advisory Board Meeting with President Lyndon B. Johnson], Top Secret, January 30, 1964 description of the main document
White House, PFIAB, Covert Action Panel Meeting 6/5/64 (Discussion with Secretary, Special Group, et al.),” Top Secret, June 5, 1964 description of the main document
CIA, “Minutes of Meeting of the Special Group, April 25, 1963,”Secret Eyes Only, April 25, 1963 [with April 26 Memorandum for the Record attached] description of the main document