Humenik, Frank J., Steve Ainsworth, Roy R. Carriker, Joseph A. Cotruvo, Glenn J. Hoffman, Lawrence W. Libby, Marian Mlay, et al. “Water Quality: Agriculture’s Role”. Council for Agricultural Science and Technology (CAST) (December 8, 1992). Accessed July 2, 2026. https://publications.cast-science.org/CAST/article/view/230.