APA (7th ed.) Citation

(1940). Vol. 33, № 1-3; Vol. 35, № 2; Economic Geology. 1938, 1940.

Chicago Style (17th ed.) Citation

Vol. 33, № 1-3; Vol. 35, № 2; Economic Geology. 1938, 1940, 1940.

MLA (9th ed.) Citation

Vol. 33, № 1-3; Vol. 35, № 2; Economic Geology. 1938, 1940, 1940.

Warning: These citations may not always be 100% accurate.