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1by Zeilinger, John E.Subjects: “...Anthracite coal Pennsylvania....”
Published 1970
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2by Dowd, James J.Subjects: “...Coal Pennsylvania Cambria County....”
Published 1950
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3by Dowd, James J.Subjects: “...Coal Pennsylvania Westmoreland County....”
Published 1951
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4by Dowd, James J.Subjects: “...Coal Pennsylvania Fayette County....”
Published 1951
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5by Dowd, James J.Subjects: “...Coal Pennsylvania Jefferson County....”
Published 1952
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6Subjects: “...Anthracite coal Pennsylvania....”
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7by Glover, Albert D.Subjects: “...Bituminous coal Pennsylvania Clarion County Maps....”
Published 1987
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8by Skema, Viktoras W.Subjects: “...Bituminous coal Pennsylvania Washington County Maps....”
Published 1987
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9by Gait, G. B. (George B.)Subjects: “...Anthracite coal Pennsylvania Maps....”
Published 1978
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10by Read, Charles B. (Charles Brian), 1907-Subjects: “...Coal Pennsylvania Dutch Mountain....”
Published 1946
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12by Wood, Gordon H. (Gordon Harry), 1919-Subjects: “...Anthracite coal Pennsylvania Dauphin County Maps....”
Published 1968
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13Published 1990Subjects: “...Coal Pennsylvania Combustion....”
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14by Patterson, E. D. (Elmer Davisson)Subjects: “...Coal Pennsylvania Clarion County Maps....”
Published 1972
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15Published 1980Subjects: “...Anthracite coal Pennsylvania Statistics Periodicals....”
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16by Wood, Gordon H. (Gordon Harry), 1919-Subjects: “...Anthracite coal Pennsylvania Schuylkill County Maps....”
Published 1972
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17by Wood, Gordon Harry, 1919-Subjects: “...Anthracite coal Pennsylvania Schuylkill County Maps....”
Published 1974
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18by Bergin, M. J. (Marion Joseph), 1927-Subjects: “...Anthracite coal Pennsylvania Luzerne County Maps....”
Published 1973
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19by Bergin, M. J. (Marion Joseph), 1927-Subjects: “...Anthracite coal Pennsylvania Luzerne County Maps....”
Published 1976
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20by Wood, Gordon H. (Gordon Harry), 1919-Subjects: “...Anthracite coal Pennsylvania Schuylkill County Maps....”
Published 1968
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