Ashley, G. H., & Fisher, C. A. (1910). The valuation of public coal lands: The value of coal land. Department of the Interior, United States Geological Survey.
Chicago Style (17th ed.) CitationAshley, Geo. H., and Cassius A. Fisher. The Valuation of Public Coal Lands: The Value of Coal Land. Washington, D.C.: Department of the Interior, United States Geological Survey, 1910.
MLA (9th ed.) CitationAshley, Geo. H., and Cassius A. Fisher. The Valuation of Public Coal Lands: The Value of Coal Land. Department of the Interior, United States Geological Survey, 1910.
Warning: These citations may not always be 100% accurate.