1971. 2012-03-14T17:10:05Z. 2013-04-18T14:04:24Z. Gibbons, Anthony B. U.S. Geological Survey. English. Public. Kentucky, Campbell County, and Kenton County.
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1975. 2012-04-27T19:39:42Z. 2012-05-03T15:42:28Z. Gibbons, Anthony B. U.S. Geologic Survey. English. Public. Kentucky, Campbell County, Ohio, and Clermont County.