1980. 2015-05-05T19:25:05Z. 2015-05-19T22:10:49Z. Wray, James R. Dept. of the Interior, U.S. Geological Survey. English. cartographic image. Public. Pennsylvania, Pittsburgh Region, Pittsburgh Region (Pa.), and Pittsburgh Metropolitan Area (Pa.).
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2. Satellite image map of northeastern Illinois ; Land use and land cover map of northeastern Illinois
1985. 2018-05-15T18:22:46Z. 2018-05-15T18:22:46Z. Dahlberg, Richard E. Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey. English. cartographic image. Public. Illinois and Illinois.