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1by Dyson, James Lindsay, 1912-1967“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1967
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2by Miller, J. T. (John T.), 1906-“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1971
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3by Faill, Rodger T.“...Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic...”
Published 1974
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4by Royer, Denise W.“..., Bureau of Topographic and Geologic Survey : Additional copies may be purchased from State Book Store,...”
Published 1984
Book