Warfield, R. S., & Boley, C. C. (1969). Sampling and coking studies of several coalbeds in the Kokolik River, Kukpowruk River, and Cape Beaufort areas of arctic northwestern Alaska. United States Department of the Interior, Bureau of Mines.
Chicago Style (17th ed.) CitationWarfield, R. S., and Charles C. Boley. Sampling and Coking Studies of Several Coalbeds in the Kokolik River, Kukpowruk River, and Cape Beaufort Areas of Arctic Northwestern Alaska. [Washington, D.C.]: United States Department of the Interior, Bureau of Mines, 1969.
MLA (9th ed.) CitationWarfield, R. S., and Charles C. Boley. Sampling and Coking Studies of Several Coalbeds in the Kokolik River, Kukpowruk River, and Cape Beaufort Areas of Arctic Northwestern Alaska. United States Department of the Interior, Bureau of Mines, 1969.