Siemens, J.C., M.C. Shurtleff, B.J. Jacobsen, D.C. Kuhlman, M.D. McGlamery, R.A. Pope, R.D. Walker and H.J. Poeschl. 1980. Tillage systems for Illinois. Circular C1172, University of Illinois Cooperative Extension Service, 24 pp.

Drablos, C.J.W., W.D. Lembke, J.K. Mitchell and M.C. Schendel. 1982. Terrace systems in Illinois: Questions and answers. Circular C1203, University of Illinois Cooperative Extension Service, 8 pp.

Walker, R.D. and R. A. Pope. 1983. Estimating your soil erosion losses with the Universal Soil Loss Equation (USLE). Circular C1220, University of Illinois Cooperative Extension Service, 21 pp.

Stall, J.B., W.D. Lembke, M.C. Schendel, D.H. Vanderholm, and D.W.Graffis. 1983. Design for a grassed waterway. Circular C1225, University of Illinois Cooperative Extension Service, 21 pp.

Drablos, C.J.W. and R.C. Moe. 1984. Illinois Drainage Guide. Circular C1226, University of Illinois Cooperative Extension Service, 47 pp.

Uchtmann, D.L. and D. Rolf. 1991. Illinois Drainage Law. Circular C1305, University of Illinois Cooperative Extension Service, 39 pp.

Kuhlman, D.E., T.J. Bicki, L.V. Boone, A.S. Felsot, R.G. Hoeft, J.W. Scott and F.W Simmons. 1991. Protecting water quality in Illinois: Nutrient and pesticide management strategies. Circular C1315, University of Illinois Cooperative Extension Service, 52 pp.

Funk, T.L., G. Bartzis and J. Treagust. 1993. Designing and managing livestock waste lagoons in Illinois. Circular C1326, University of Illinois Cooperative Extension Service, 18 pp.

University of Illinois Cooperative Extension Service. 1995. Illinois Agronomy Handbook: 1995-96. Circular 1333, 205 pp.