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21. Greene County, Illinois

Maps University Of Minnesota Public content
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1953."; May 1980.; Includes location map. 54 x 63 centimeters 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).

22. Greene County, Iowa, 1981, aerial photomosaic index

Imagery University Of Iowa Public content
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.

24. Ground-water resources of Harrison County

Maps The Ohio State University Public content
1980. Crowell, Katie. Includes location map. by Katie Crowell ; cartography, Craig A. Schottenstein. Scale approximately 1:63,000. Relief shown by contours and spot heig... Ohio. Division of Water.

25. Ground-water resources of Knox County

Maps The Ohio State University Public content
1980. Schmidt, James J. Includes location map. Relief shown by contours and spot heights. by James J. Schmidt ; cartography, VK. Scale approximately 1:63,000. Ohio. Division of Water.

26. Grundy County, (Ill.)

Maps University Of Minnesota Public content
1980. United States. Soil Conservation Service. "Interpretations derived from soil map constructed 1979."; May 1980.; Includes location map. 51 x 50 centimeters 1:100,000. Dept. of Agriculture, Soil Conservation Service (Washington.).

27. Grundy County, Iowa, 1980, aerial photomosaic index

Imagery University Of Iowa Public content
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.

28. Guthrie County, Iowa, 1982, aerial photomosaic index

Imagery University Of Iowa Public content
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.

29. Hamilton County, Iowa, 1980, aerial photomosaic index

Imagery University Of Iowa Public content
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.

30. Hancock County, Iowa, 1980, aerial photomosaic index

Imagery University Of Iowa Public content
1980. Title supplied by cataloger based on information from sheet labels. Images are photoreductions of mosaics created from original aerial photographs.... United States. Agricultural Stabilization and Conservation Service.