1. Arnold , J. A. The SWAT model report Temple, Tex. 1996
2. Ferhenbacher , J. B. Soils of Illinois, Bull 778 Coll. of Agric. Agric. Exp. Sn., Univ. of Ill. at Urbana-Champaign 1984
3. Healy , R. W. River Mileages and Drainage Areas for Illinois Streams 2 Illinois River Basin U.S. Geol. Surv. Urbana, Ill. 1979