Zubovic, P., Sheffey, N. B., & Stadnichenko, T. M. (1961). Geochemistry of minor elements in coals of the northern Great Plains coal province. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationZubovic, Peter, Nola B. Sheffey, and Taisia Maximovna Stadnichenko. Geochemistry of Minor Elements in Coals of the Northern Great Plains Coal Province. Washington, D.C.: United States Department of the Interior, Geological Survey, 1961.
MLA (9th ed.) CitationZubovic, Peter, et al. Geochemistry of Minor Elements in Coals of the Northern Great Plains Coal Province. United States Department of the Interior, Geological Survey, 1961.
Warning: These citations may not always be 100% accurate.