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32. Hydrogeologic and water-quality characteristics of glacial-drift aquifers in Minnesota
33. Hydrogeologic and water-quality characteristics of the Ironton-Galesville aquifer, southeast Minnesota
34. Hydrogeologic and water-quality characteristics of the Prairie du Chien-Jordan aquifer, southeast Minnesota
35. Hydrogeologic and water-quality characteristics of the St. Peter aquifer, southeast Minnesota
36. A hydrologic description of Keystone Lake near Tampa, Florida
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