This report is a ten year review of the regional depository library system for federal government documents which was established by the Depository Library Act of 1962. It describes the status of programs which regional libraries have undertaken to comply with the requirements of the Act to "provide interlibrary loan, reference service, and assistance in the disposal of unwanted publications." Also described are the retention policy of regional libraries for materials which they are authorized to discard as an exception to the Act, and the attitude of documents librarians on the desirability of providing federal support to regional depository libraries. The report traces the history of earlier depository library legislation, and analyzes the ten year results of other major changes of the Act of 1962: increase in the number of congressional designations, increase in the number of federal depository libraries, and distribution of non-GPO documents through the depository library system. The report is based on response to a mail questionnaire, visits to selected regional depositories, and the experience of the author who is a regional depository librarian. (Author)