Clark, D. W. (1990). Pesticides in soils and ground water in selected irrigated agricultural areas near Havre, Ronan, and Huntley, Montana. U.S. Geological Survey.
Chicago Style (17th ed.) CitationClark, David W. Pesticides in Soils and Ground Water in Selected Irrigated Agricultural Areas Near Havre, Ronan, and Huntley, Montana. Helena, Montana: U.S. Geological Survey, 1990.
MLA (9th ed.) CitationClark, David W. Pesticides in Soils and Ground Water in Selected Irrigated Agricultural Areas Near Havre, Ronan, and Huntley, Montana. U.S. Geological Survey, 1990.
Warning: These citations may not always be 100% accurate.