I. Princeton University Correspondence and Files
- Paul L. Forman - Correspondence, 1973
- Princeton University Press
- Peter G. Bergmann - Correspondence, 1956-1971
- See also Series I: Misner, Charles W. (1956); Prentice-Hall, Inc.
- Peter Putnam - Correspondence, 1954-1975
- Fuller, Robert W.; Lewis, Margaret N.; Putnam, Mildred A. -- See also Series I: Eisenhart, Luther P. (1957); Fuller, Robert W.; Misner, Charles W. (1955); Putnam, Mildred. -- See also Series III: Gravitational Radiation
- Philip James Edwin Peebles - Correspondence, 1962-1974
- Gunn, J. -- See also Series I: Dicke, Robert H. (1965)
- Ralph Frederick Baierlein - Correspondence, 1961-1968
- Purcell, Edward M.
- Richard Phillips Feynman - Correspondence, 1955-1976
- Weisskopf, Victor F. -- See also Series I: Misner, Charles W. (1955); Weaver, Warren