Abstract The Ezra Clark Knowlton papers (1919-1979) consist of materials surrounding Knowlton's involvement with various Utah public service organizations.

Abstract The Utah Sand and Gravel Products Company history (1958) consist of a typed draft, written by Ezra Knowlton. Knowlton describes the company's early history, the construction of each of the plants, and the major contracts. Also included is a brief section on the unionization of the company and subsequent employee-management relations.