1. Evans , R. D. H. Schnepper Sources of suspended sediment: Spoon River, Illinois 1977
2. Illinois Environmental Protection Agency Problem assessment report: Soil erosion subcommittee Springfield 1978
3. Leedy , J. B. Observations on the sources of sediment in Illinois streams Springfield 1979
4. McHenry , J. R. J. C. Ritchie Redistribution of cesium-137 in southeastern watersheds 1975