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1Cyhoeddwyd 1981
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2Cyhoeddwyd 1943
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3gan Randall, Allan D., 1932-
Cyhoeddwyd 1970
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4Cyhoeddwyd 1952
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5gan Kinkel, Arthur R (Arthur Rudolph), 1907-1986
Cyhoeddwyd 1962
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6gan Dickerman, David C
Cyhoeddwyd 1997
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7Cyhoeddwyd 1963
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8gan Briggs, Reginald P., 1929-2009
Cyhoeddwyd 1974
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9Cyhoeddwyd 1987
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10Cyhoeddwyd 1954
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11Cyhoeddwyd 1980
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12Sources of geologic and hydrologic information pertinent to ground-water resources in Rhode Island /gan Trench, Elaine C. Todd
Cyhoeddwyd 1995
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13Cyhoeddwyd 1994
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14Compilation of selected geophysical references for the Snake River Plain, Idaho and eastern Oregon /Cyhoeddwyd 1986
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15Cyhoeddwyd 1981
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16Cyhoeddwyd 1970
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17gan Rice, Dudley D
Cyhoeddwyd 1976
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18Cyhoeddwyd 1971
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19Cyhoeddwyd 1925
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20gan Moore, George W., 1928-2007
Cyhoeddwyd 1990
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