Hanson, P. E. (1998). Pesticides and nitrates in surficial sand and gravel aquifers as related to modeled contamination susceptibility in part of the Upper Mississippi River Basin. U.S. Geological Survey.
Chicago Style (17th ed.) CitationHanson, Paul E. Pesticides and Nitrates in Surficial Sand and Gravel Aquifers as Related to Modeled Contamination Susceptibility in Part of the Upper Mississippi River Basin. [Mounds View, Minn.]: U.S. Geological Survey, 1998.
MLA (9th ed.) CitationHanson, Paul E. Pesticides and Nitrates in Surficial Sand and Gravel Aquifers as Related to Modeled Contamination Susceptibility in Part of the Upper Mississippi River Basin. U.S. Geological Survey, 1998.
Warning: These citations may not always be 100% accurate.