1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).
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1980. United States. Soil Conservation Service. Shows land use.; "In cooperation with Alabama Agriculture and Engineering Experiment Stations and Tennessee Valley Authority utilizing Alabama Reso... USDA-SCS (Fort Worth, Tex.).
1980. United States. Soil Conservation Service. Shows land use.; "In cooperation with Alabama Agriculture and Engineering Experiment Stations and Tennessee Valley Authority utilizing Alabama Reso... The Service (Washington, D.C.?).
1980. United States. Soil Conservation Service. Shows land use.; "In cooperation with Alabama Agriculture and Engineering Experiment Stations and Tennessee Valley Authority utilizing Alabama Reso... The Service (Washington, D.C.?).
1980. United States. Soil Conservation Service. Shows land use.; "In cooperation with Alabama Agriculture and Engineering Experiment Stations utilizing Alabama Resource Information System."; Incl... The Service (Washington, D.C.?).
1980. United States. Soil Conservation Service. Shows land use.; "Prepared in cooperation with Alabama Agriculture and Experiment Stations and Office of State Planning and Federal Programs utiliz... The Service (Auburn, Ala.?).