Ruhl, J. F. (1987). Hydrogeologic and water-quality characteristics of glacial-drift aquifers in Minnesota. Department of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationRuhl, J. F. Hydrogeologic and Water-quality Characteristics of Glacial-drift Aquifers in Minnesota. St. Paul, Minnesota: Department of the Interior, U.S. Geological Survey, 1987.
MLA (9th ed.) CitationRuhl, J. F. Hydrogeologic and Water-quality Characteristics of Glacial-drift Aquifers in Minnesota. Department of the Interior, U.S. Geological Survey, 1987.
Warning: These citations may not always be 100% accurate.