Abernathy, John R., Thomas L. Archer, James L. Barrentine, John R. Barrett, Thomas E. Bedell, Evert K. Byington, Alan G. Dexter, et al. 1990. “Ecological Impacts of Federal Conservation and Cropland Reduction Programs”. Council for Agricultural Science and Technology (CAST), September. https://doi.org/10.62300/rfagt759.