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MLA

Joe Makuch, Bonnie Emmert, and Water Quality Information Center (U.S.). "Simulation Models, Gis and Nonpoint-source Pollution (i) : January 1991-december 1993." , electronic. Print

APA

Joe Makuch, J. Makuch, Bonnie Emmert, B. Emmert, & Water Quality Information Center (U.S.), W. Quality Information Center (U.S.). (0000). Simulation models, GIS and nonpoint-source pollution (I) : January 1991-December 1993.

Chicago

Joe Makuch, Bonnie Emmert, and Water Quality Information Center (U.S.). "Simulation models, GIS and nonpoint-source pollution (I) : January 1991-December 1993" (1994): electronic.