Collection consists of issues of the OCA newsletter, whose predominant name was OCAsional news.

Series consists of books, periodicals, reports, brochures, and published and unpublished papers relating to labour history in Canada and the United States. Topics covered include the North American Free Trade Agreement, unemployment insurance, workplace safety, social issues (e.g., homelessness; food insecurity), and provincial and federal legislation (e.g., Bill C-12; Bill C-11; Bill C-23). Collective agreements in Peterborough and Ontario are well represented through several pocket-sized volumes. Unions include United Packinghouse Food Allied Workers of America, Shoeworker’s Union, Textile Workers Union of America, Canadian Labour Congress Federal Union, and Amalgamated Silver, Jewelry and Allied Workers' Union. Companies include Quaker Oats Company, Bata Shoe Company, Huyck Corporation, Canadian Coleman Company, and Benedict-Proctor Manufacturing Co. Limited. Series also includes several shop steward’s manuals ([1947?]-[1949?]) and two union ritual manuals (1949 and n.d.). Series is organized chronologically, then alphabetically.

Collection consists of pamphlets, flyers, newsletters, and government reports regarding agricultural policy, issues, and regulations, especially pertaining to the Durham County region. Subjects include soil conditions, pesticide and herbicide use, etc.

Series consists of various materials relating to Doug Sadler's life, including his cv, a letter from his daughter, material relating to his attendance at teachers college and work as a teacher, and an issue of Massey-Harris Illustrated.