Cite
MLA (8th Edition)
U.S. Geological Survey Professional Paper, No. 185 A-I.. U.S. G.P.O, 1934.
APA (7th Edition)
U.S. Geological Survey professional paper, no. 185 A-I.. (1934). U.S. G.P.O.
Chicago (17th Edition)
U.S. Geological Survey Professional Paper, No. 185 A-I. Washington: U.S. G.P.O, 1934.