APA (7th ed.) Citation

Deul, M., & Annell, C. S. (1956). The occurrence of minor elements in ash of low-rank coal from Texas, Colorado, North Dakota and South Dakota. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Deul, Maurice, and C. S. Annell. The Occurrence of Minor Elements in Ash of Low-rank Coal from Texas, Colorado, North Dakota and South Dakota. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1956.

MLA (9th ed.) Citation

Deul, Maurice, and C. S. Annell. The Occurrence of Minor Elements in Ash of Low-rank Coal from Texas, Colorado, North Dakota and South Dakota. United States Department of the Interior, Geological Survey, 1956.