APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1929). Contributions to economic geology (short papers and preliminary reports), 1928. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Contributions to Economic Geology (short Papers and Preliminary Reports), 1928. Washington: [publisher not identified], 1929.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Contributions to Economic Geology (short Papers and Preliminary Reports), 1928. [publisher not identified], 1929.

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