575 manuscript boxes, 7 oversize boxes, 2 card file boxes, 28 envelopes, 47 sound tape reels, 4 sound cassettes, 11 sound discs
(248.4 linear feet)
Speeches and writings, correspondence, notes, printed matter, sound recordings, and photographs relating to philosophy, the nature of knowledge, the philosophy of culture, the philosophy and methodology of science, and the philosophy of history and the social sciences.
Hoover Institution Archives
Popper, Karl R. (Karl Raimund), 1902-1994.