1981. U-Spatial. A sublayer from migration routes for the five largest refugee populations in modern US history. This layer focuses on Afghanistan refugee migration...
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1981. Eastern half of a map commissioned by the U. S. Department of Agriculture Soil Conservation Service showing all areas of important farmland in Atla...
1981. Western half of a map commissioned by the U. S. Department of Agriculture Soil Conservation Service showing all areas of important farmland in Atla...
1981. Ruger, A., cartographer. Bird's-eye view.; Facsimile.; Includes illustrations and index to points of interest. Scale not given. Allen County-Fort Wayne Historical Society.
1981. Eastern half of a map commissioned by the U. S. Department of Agriculture Soil Conservation Service showing all areas of important farmland in Cumb...
1981. Western half of a map commissioned by the U. S. Department of Agriculture Soil Conservation Service showing all areas of important farmland in Cumb...
1981. Schmidt, James J. Includes location map. Scale 1:62,500 Relief shown by contours and spot heights. by James J. Schmidt ; cartography, VK. Ohio. Division of Water.
1981. Schmidt, James J. Includes location map. Scale 1:62,500 Relief shown by contours and spot heights. by James J. Schmidt ; cartography, VK. Ohio. Division of Water.
1981. Schmidt, James J. Includes location map. Scale 1:62,500 Relief shown by contours and spot heights. by James J. Schmidt ; cartography, VK. Ohio. Division of Water.
1981. Kostelnick, Richard J. by Richard J. Kostelnick ; cartography, VK. Relief shown by contours and spot heights. Includes location map. Scale 1:62,500. Ohio. Division of Water.