APA (7th ed.) Citation

Geological Survey (U.S.) & Ries, H. (1902). Occurrence of glass-pot clays in U.S. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Heinrich Ries. Occurrence of Glass-pot Clays in U.S. Washington, D.C.: [publisher not identified], 1902.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Heinrich Ries. Occurrence of Glass-pot Clays in U.S. [publisher not identified], 1902.