Subject heading list.

APA Citation

National Agricultural Library (U.S.). (1963). Subject heading list. Prelim. ed. Washington: [For sale by the Superintendent of Documents, U.S. Govt. Print. Off.].

MLA Citation

National Agricultural Library (U.S.). Subject Heading List. Prelim. ed. Washington: [For sale by the Superintendent of Documents, U.S. Govt. Print. Off.], 1963.

Warning: These citations may not always be complete (especially for serials).