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1by Paulachok, Gary N.“...U.S. Geological Survey ;...”
Published 1984
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2by Paulachok, Gary N.“...U.S. Geological Survey,...”
Published 1984
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3by Paulachok, Gary N.“...U.S. Dept. of the Interior, Geological Survey ;...”
Published 1985
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4by McCabe, Gregory J.“...Dept. of the Interior, U.S. Geological Survey ;...”
Published 1990
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5by Speight, Deloris W.“...Dept. of the Interior, U.S. Geological Survey :...”
Published 1989
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6by Paulachok, Gary N.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1991
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7by McGee, E. S.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 1996
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8by Sloto, Ronald A.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2003
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9Published 2010“...U.S. Department of the Interior, U.S. Geological Survey,...”
Use place name Wyndmoor to find quadrangle under this title
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10Published 2010“...U.S. Department of the Interior, U.S. Geological Survey,...”
Use USGS map name Hatboro to find quadrangle under this title
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11Published 2010“...U.S. Department of the Interior, U.S. Geological Survey,...”
Use USGS map name Langhorne to find quadrangle under this title
Use USGS map name search Langhorne to find quadrangle under this title
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12Published 2010“...U.S. Department of the Interior, U.S. Geological Survey,...”
Use place name Folcroft to find quadrangle under this title
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13by Bascom, F. (Florence), 1862-1945“...Department of the Interior, United States Geological Survey,...”
Published 1904
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14“...U.S. Department of the Interior, U.S. Geological Survey,...”
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15
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16
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