Averitt, P. (1969). Coal resources of the United States, January 1, 1967: A summary and analysis of information concerning the quantity and distribution of coal in the United States. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationAveritt, Paul. Coal Resources of the United States, January 1, 1967: A Summary and Analysis of Information Concerning the Quantity and Distribution of Coal in the United States. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1969.
MLA (9th ed.) CitationAveritt, Paul. Coal Resources of the United States, January 1, 1967: A Summary and Analysis of Information Concerning the Quantity and Distribution of Coal in the United States. United States Department of the Interior, Geological Survey, 1969.