Peak, Helen (*), 1932-1956 Box 39, Folder 732 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Professional Correspondence, 1898-1982
Pearce, Richard M. (*), 1926-1930 Box 39, Folder 733 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Professional Correspondence, 1898-1982
Pearl, Raymond (*), 1903-1936 Box 39, Folder 734-736 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Professional Correspondence, 1898-1982
Pellens, Mildred Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Professional Correspondence, 1898-1982
Pencil drawing done in Conakry, Guinea by Roberta Yerkes, 1929-1929 Box 1, Folder 4 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Additional Material, 1929-1983
Pennsylvania Society of Sons of the Revolution, 1927-1955 Box 158, Folder 2473 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Personal Papers, 1822-1965Organizations
Periodicals Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Subject Files, 1893-1967
Period of Nissen and Lashley deaths, 1955-1959 Box 111, Folder 2063 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Subject Files, 1893-1967Yerkes Laboratories of Primate BiologyDirector
Perkins, R. Marlin: Lincoln Park Zoological Gardens, Chicago, 1950-1952 Box 67, Folder 1279 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Subject Files, 1893-1967Gorilla Studies
Permission for reproducing, 1958, 1965 Box 84, Folder 1639 Bookmark Collection Context Yale University -Manuscripts and Archives Robert Mearns Yerkes papers, 1822-1985Subject Files, 1893-1967Reprints and reproducing