Classification. Class Q: Science.

APA Citation

Library of Congress. Classification Division., Perley, C. W. (Clarence Warner)., Thompson, J. David. (1921). Classification. Class Q: Science. 3d ed. Washington: Govt. print. off..

MLA Citation

Library of Congress. Classification Division, Clarence W. (Clarence Warner) Perley, and James David Thompson. Classification. Class Q: Science. 3d ed. Washington: Govt. print. off., 1921.