Collections : [University of Michigan Bentley Historical Library]

Republican member of the state house and the state senate; president of the University Musical Society. Legislative and campaign files, 1919-1935, detailing his election campaigns, his activities within the legislature, and his various responsibilities as a member of the Republican State Central Committee; general correspondence files, 1922-1960, largely pertaining to his work with the University Musical Society and other civic activities; topical files; family history and memoirs; diaries and appointment books; papers of wife Alva Gordon Sink; and visual materials.

Professor of education and psychology at the University of Michigan, director of child development research, 1929-1952, and dean of the University's School of Education, 1952-1970. Professional correspondence and topical files concerning his interest in the University's elementary school, the Interamerican Society of Psychology, and UNESCO; reprints and manuscripts of writings; speeches relating to education, child development and child psychology; and visual materials.

The Willard C. Olson collection consists of professional correspondence and topical files concerning his interest in the University's elementary school, the Interamerican Society of Psychology, and UNESCO; reprints and manuscripts of writings; speeches relating to education, child development and child psychology; and visual materials. The collection is organized into the following series: Personal/Biographical; Correspondence; Manuscripts, articles, reviews, and speeches; Topical files; Miscellaneous; Visual Materials; and Topical Files transferred from the U-M School of Education record group in 1995.