Anderson, R. V., J. W. Grubaugh, and D. B. Markillie. 1991. Summary of water quality characteristics at selected habitat sites - Navigation Pool 26 of the Mississippi River, July 17 through October 31, 1988. Report by Western Illinois University, Macomb, Illinois, for the U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin, March 1991. EMTC 91-01. 48 pp. (NTIS # PB91 174128)
Eckblad, J. W. 1991. LTRMP Observational Bulletin No. 1. Status of macroinvertebrate populations of the Upper Mississippi River. Report by Luther College, Decorah, Iowa, for the U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin, April 1991. EMTC 91-03. 8 pp. (NTIS # PB91-197863)
Laustrup, M. S., and J. H. Wlosinski. 1991. Guidelines for the collection of spatial data for the Upper Mississippi River. U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin, July 1991. EMTC 91-06. 35 pp. (NTIS # PB91-235937)
U.S. Army Corps of Engineers. 1991. Identification of constraints on regulation of Upper Mississippi River System Lock and Dam 18. Report by the U.S. Army Corps of Engineers, Rock Island, Illinois, for the U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin, September 1991. EMTC 91-07. 54 pp. (NTIS # PB92 104728)
U.S. Fish and Wildlife Service. 1991. Draft Fiscal Year 1992 Annual Work Plan for the Long Term Resource Monitoring Program, Upper Mississippi River System. U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin, July 1991. 50 pp.
White, B. M., and T. W. Owens. 1991. Geographic information system pilot project for the Upper Mississippi River System. Report by the U.S. Fish and Wildlife Service, National Ecology Research Center, and TGS Technology, Inc., Fort Collins, Colorado, for the U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin, June 1991. EMTC 91-05. 48 pp. (NTIS # PB91-218172)