Geological Survey (U.S.). (1940). Geophysical Abstracts 96, Jan.-Mar. 1939. [s.n.].
Chicago Style (17th ed.) CitationGeological Survey (U.S.). Geophysical Abstracts 96, Jan.-Mar. 1939. [Washington]: [s.n.], 1940.
MLA (9th ed.) CitationGeological Survey (U.S.). Geophysical Abstracts 96, Jan.-Mar. 1939. [s.n.], 1940.
Warning: These citations may not always be 100% accurate.