Monthly catalog of United States Government publications /

One issue per year, 1977 (no. 988)-1984 (no. 1074), 2001 (no. 1294)- has title: Serials supplement; one issue per year, 1985-1991, has title: Periodicals supplement; one issue each year, 1992-2000, has title: Periodicals supplement for ... (varies slightly)Feb. issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; Sept. issue includes a list of regional depository libraries; June and Dec. issues include semiannual index.Microfiche.Mode of access: Internet.Vols. for Jan. 1951-19 , Jan. 1985- issued by: Superintendent of Documents; <Jan. 1983>-Dec. 1984 issued by: Information Dissemination/Superintendent of Documents; <Feb. 1991-> Cataloging Branch, Library Division, Library Programs Service, Superindentent of Documents.No. 672-791, 1951-1960. 2 v.; no. 792-851, 1961-1965. 2 v.; no. 852-911, 1966-1970. 2 v.; no. 912-977, 1971-June 1976. 2 v.; July 1976-1980. 6 v.; Author index: no. 672-791, 1951-1960. 1 v.; no. 792-851, 1961-1965. 1 v.; no. 852-911, 1966-1970. 1 v.; no. 912-971, 1971-1975. 1 v.; Subject index: no. 61-923, 1900-1971. 15 v. (Includes index to earlier titles); 1976-1980. 6 v.; 1981-1985. 7 v