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by Glaeser, J. Douglas
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey : may be purchased from State Book Store, 1974
“...General geology report - Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey...”Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey : may be purchased from State Book Store, 1974
Book