Sholes, M. A., Edmunds, W. E., & Skema, V. (1979). The economic geology of the Upper Freeport coal in the New Stanton area of Westmoreland County, Pennsylvania: A model for coal exploration. Pennsylvania Geological Survey.
Chicago Style (17th ed.) CitationSholes, Mark A., William E. Edmunds, and Viktoras Skema. The Economic Geology of the Upper Freeport Coal in the New Stanton Area of Westmoreland County, Pennsylvania: A Model for Coal Exploration. Harrisburg: Pennsylvania Geological Survey, 1979.
MLA (9th ed.) CitationSholes, Mark A., et al. The Economic Geology of the Upper Freeport Coal in the New Stanton Area of Westmoreland County, Pennsylvania: A Model for Coal Exploration. Pennsylvania Geological Survey, 1979.
Warning: These citations may not always be 100% accurate.