APA (7th ed.) Citation

Pennsylvania. Bureau of Topographic and Geologic Survey & Dodge, C. H. (1985). Coal resources of Allegheny County, Pennsylvania: Part 1, coal crop lines, mined-out areas, and structure contours. Commonwealth of Pennsylvania, Dept. of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey.

Chicago Style (17th ed.) Citation

Pennsylvania. Bureau of Topographic and Geologic Survey and Clifford H. Dodge. Coal Resources of Allegheny County, Pennsylvania: Part 1, Coal Crop Lines, Mined-out Areas, and Structure Contours. Harrisburg: Commonwealth of Pennsylvania, Dept. of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey, 1985.

MLA (9th ed.) Citation

Pennsylvania. Bureau of Topographic and Geologic Survey and Clifford H. Dodge. Coal Resources of Allegheny County, Pennsylvania: Part 1, Coal Crop Lines, Mined-out Areas, and Structure Contours. Commonwealth of Pennsylvania, Dept. of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey, 1985.