APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1910). [Geological Survey bulletin 420; Economic geology of feldspar deposits of U.S.]. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). [Geological Survey Bulletin 420; Economic Geology of Feldspar Deposits of U.S.]. Washington: [publisher not identified], 1910.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). [Geological Survey Bulletin 420; Economic Geology of Feldspar Deposits of U.S.]. [publisher not identified], 1910.

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