368540 Hildebrand, R. T. (1981). Chemical analyses of coal from the Krebs Group (Pennsylvanian), Arkoma Basin, Eastern Oklahoma. Reston, Va. : U.S. Geological Survey.
Chicago Style (17th ed.) Citation368540 Hildebrand, Ricky T. Chemical Analyses of Coal from the Krebs Group (Pennsylvanian), Arkoma Basin, Eastern Oklahoma. Reston, Va. : U.S. Geological Survey, 1981.
MLA (9th ed.) Citation368540 Hildebrand, Ricky T. Chemical Analyses of Coal from the Krebs Group (Pennsylvanian), Arkoma Basin, Eastern Oklahoma. Reston, Va. : U.S. Geological Survey, 1981.
Warning: These citations may not always be 100% accurate.