APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1917). Bulletin 625. The enrichment of ore deposits. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Bulletin 625. The Enrichment of Ore Deposits. Washington: [publisher not identified], 1917.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Bulletin 625. The Enrichment of Ore Deposits. [publisher not identified], 1917.

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