Oswald West papers
Pacific Northwest Stream Survey
Pamela J. Peters Standing Rock Protest photographs (PH 398)
Paula Gunn Allen papers
PCUN records
Petrarch Canzoniere
Phil Decker Crop Festival Photographs
Picturing the Cayuse, Walla Walla, and Umatilla Tribes
Postcard collection, circa 1904-1940
Quincy Scott Political Cartoons, 1904-1949
Ralph Dyar papers, 1907-1955
Randall V. Mills Transportation Collection (1907-1952) photographs, ca. 1937-1952
Reuniting Finley and Bohlman
Richard Haviland Smythe papers
Richard Neuberger papers, 1930-1960
Richard Sundeleaf papers and architectural records
Rising Flood Waters: 1964 Corvallis
Roy C. Andrews photographs, 1902-1955
Royal Augustus Bensell diary and scrapbook
Ruth Cornwall Woodman papers
