Each depository library gives its surrounding community free access to government information. Publications received by the Clearinghouse from state government agencies are distributed to a network of fifteen depository libraries located throughout Oklahoma, as well as the U.S. Library of Congress. In 1985, the Oklahoma Department of Libraries initiated a program to microfilm state government publications. This program enabled all depository libraries within the Oklahoma State Depository Library System to receive copies of all available publications. Prior to 1985, only six libraries were designated as total depositories within the OPC system, and as such, received copies of all available publications.
All depository libraries provide reference assistance and participate in interlibrary loan.
For additional information on the Oklahoma Publications Clearinghouse and the state's depository library program, try the webpage for Oklahoma Department of Libraries. The Northwestern Oklahoma State University J. W. Martin Library became a Federal depository in 1907. It serves the Government information needs of the 23 counties in the 6th U.S. Congressional District of Oklahoma. The Government Documents Collection is staffed by one full-time professional librarian, one paraprofessional, and student assistants. The Documents area is on the second floor, southwest, of the main library.