Gilbert, Felix, 1905-1991; Kaysen, Carl; Oppenheimer, J. Robert, 1904-1967(Shelby White and Leon Levy Archives Center, Institute for Advanced Study, Princeton, NJ, USA, 1965-1978)
Borel, Armand; Kaysen, Carl; Oppenheimer, J. Robert, 1904-1967; Woolf, Harry(Shelby White and Leon Levy Archives Center, Institute for Advanced Study, Princeton, NJ, USA, 1960-1979)
Gilliam, J. F. (James Frank), 1915-1990; Kaysen, Carl(Shelby White and Leon Levy Archives Center, Institute for Advanced Study, Princeton, NJ, USA, 1966-1985)
Kaysen, Carl; Meiss, Millard; Panofsky-Soergel, Gerda, 1929-(Shelby White and Leon Levy Archives Center, Institute for Advanced Study, Princeton, NJ, USA, 1968-1975)