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1
Published 1911
Record Source: Published Materials
“...Geological Survey bulletin ;...”
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2
Author: Darton, Nelson Horatio, 1865-1948.
Published 1911
Record Source: Published Materials
“...Bulletin (Geological Survey (U.S.)) ;...”
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3
Author: Cate, Addison S.
Published 1961
Record Source: Published Materials
“...Special bulletin (Geological Survey of Pennsylvania) ;...”
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4
Author: Stose, George Willis, 1869-1960.
Published 1932
Record Source: Published Materials
“...Bulletin (Pennsylvania. Geological survey (4th, 1919- ) ;...”
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5
Author: Goodwin, Bruce K.
Published 1964
Record Source: Published Materials
“...Bulletin (Pennsylvania. Topographic and Geologic Survey) ;...”
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6
Author: Ashley, George H., 1866-
Published 1933
Record Source: Published Materials
“...Pennsylvania. Topographic and Geologic Survey, 4th. Bulletin G6...”
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7
“...Bulletin ; no...”
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8
“...Bulletin ; no...”
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9
Author: Willard, Bradford, 1894-
Published 1938
Record Source: Published Materials
“...Bulletin ;...”
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10
Author: Willard, Bradford, 1894-
Published 1938
Record Source: Published Materials
“...Bulletin ;...”
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11
Author: Miller, Benjamin L. 1874-1944.
Published 1939
Record Source: Published Materials
“...Bulletin ;...”
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12
Author: Willard, Bradford, 1894-1973.
Published 1938
Record Source: Published Materials
“...Bulletin ;...”
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13
Author: Bascom, F. 1862-1945.
Published 1931
Record Source: Published Materials
“...Bulletin ; 828...”
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14
Author: Hickok, W. O. 1905-
Published 1940
Record Source: Published Materials
“...Bulletin ; C26...”
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15
Author: Greenman, D. W.
Published 1955
Record Source: Published Materials
“...Bulletin ; W11...”
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16
Published 1959
Record Source: Published Materials
“...Bulletin ; C9...”
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17
Author: Swartz, Frank McKim, 1899-
Published 1950
Record Source: Published Materials
“...Bulletin ; G25...”
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18
Author: Stone, Ralph W. 1876-1964.
Published 1932
Record Source: Published Materials
“...Bulletin ; C30...”
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19
Author: Ebright, John R.
Published 1951
Record Source: Published Materials
“...Bulletin ; M34...”
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20
Author: Smith, Laurence Lowe, 1896-
Published 1931
Record Source: Published Materials
“...Bulletin ; M14...”
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