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1Published 1971“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Book -
2by Heyman, Louis“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1969
Book -
3Published 1970“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Conference Proceeding Book -
4by McGlade, William G.“...[Commonwealth of Pennsylvania, Bureau of Topographic & Geologic Survey],...”
Published 1972
Book -
5by Hollowell, Jerrald R.“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1971
Book -
6by Meisler, Harold“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1971
Book -
7by Newport, Thomas Gwyn, 1922-“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1973
Book -
8by Fauth, John L.“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1968
Book -
9by Glover, Albert D.“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1970
Book -
10by Root, Samuel I.“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1968
Book -
11by Geyer, Alan R.“...[Commonwealth of Pennsylvania, Bureau of Topographic & Geologic Survey],...”
Published 1970
Book -
12by Bucek, Milena F.“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1971
Book -
13by Dyson, James Lindsay, 1912-1967“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1967
Book -
14by Miller, J. T. (John T.), 1906-“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1971
Book -
15by Lapham, Davis M.“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1969
Book -
16by Walker, Roger G.“...[Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey],...”
Published 1972
Book -
17by Geyer, Alan R.“...Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey,...”
Published 1972
Book -
18by Rudd, Neilson“...[Commonwealth of Pennsylvania. Bureau of Topographic and Geologic Survey],...”
Published 1972
Book -
19by McGlade, William G.“...[Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey],...”
Published 1967
Book -
20by Lytle, William S.“...[Commonwealth of Pennsylvania, State Planning Board, Bureau of Topographic & Geologic Survey],...”
Published 1970
Book