APA (7th ed.) Citation

(1971). Physical sciences engineering: A directory of information resources in the United States : science and technology division National Referral Center ([1st ed.].). Library of Congress.

Chicago Style (17th ed.) Citation

Physical Sciences Engineering: A Directory of Information Resources in the United States : Science and Technology Division National Referral Center. [1st ed.]. Washington: Library of Congress, 1971.

MLA (9th ed.) Citation

Physical Sciences Engineering: A Directory of Information Resources in the United States : Science and Technology Division National Referral Center. [1st ed.]. Library of Congress, 1971.