1975. 2012-05-02T15:07:09Z. 2012-05-09T14:05:38Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky, Bracken County, and Pendleton County.
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1971. 2012-03-13T13:48:39Z. 2012-03-27T23:58:49Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky and Bracken County.
1976. 2012-05-23T19:45:53Z. 2012-06-07T16:55:01Z. Luft, Stanley Jeremie, 1927-. U.S. Geological Survey. English. Public. Kentucky, Robertson County, Henderson County, Bracken County, and Pendleton County.
1973. 2012-04-03T14:18:08Z. 2012-05-03T15:36:05Z. Osborne, Robert H. Geological Survey. English. Public. Ohio, Clermont County, Brown County, Kentucky, and Bracken County.
1971. 2012-03-20T15:08:00Z. 2012-05-03T15:29:31Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky, Mason County, and Bracken County.
1977. 2012-06-05T14:17:00Z. 2012-06-13T15:04:17Z. Wallace, Roberts Manning, 1915-. U.S. Geological Survey. English. Public. Kentucky, Robertson County, Bracken County, and U.S.