1. Geology of the Ashland quadrangle, Kentucky-Ohio, and the Catlettsburg quadrangle in Kentucky / [cartographic material] Yale Public content 1963. 2011-05-17T13:21:09Z. 2012-02-14T23:34:11Z. Dobrovolny, Ernest, 1912-. U.S. Geological Survey. English. Public. Kentucky, Boyd County, Greenup County, Ohio, and Lawrence County.