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References Dyer, M. G., P. K. Zebe, A. Rao, and M. C. Caputo. 2003. Draft Upper Mississippi River and Illinois Waterways: Non-Structural Measures Cost-Benef~t Study. Cambridge, MA: U.S. Department of Transporta- tion, Research and Special Programs Administration. Fellin, L., and S. Fuller. 1997. Effect of the proposed waterway user tax on U.S. grain flow patterns and producers. [ournal of the Transportation Research Forum 36:11-25. Fuller, S., L. Fellin, and W. Grant. 1999. Grain transportation capacity of the Upper Mississippi and Illinois Rivers: A spatial analysis. [ournal of the Transportation Research Forum 38:38-54. Koo, W. 1985. Tariffs and transportation costs and U.S. wheat exports: A quadratic programming model. In Transportation Models for Agricul- tural Products, W. Koo and D. L. Larson, eds. Boulder, CO: Westview Press. Lubinski and Barko. 2003. Upper Mississippi River-Illinois Waterway Sys- tem Navigation Feasibility Study: Environmental Science Panel Report. Draft report. Rock Island, IL, St. Louis, MO, and St. Paul, MN: U.S. Army Corps of Engineers. Martin, L. 1981. Quadratic single and multiple-commodity models of spa- tial equilibrium: A simplified exposition. Canadian [ournal of Agricul- tural Economics 29:21-48. 37
38 Upper M'ssissippi-Illinois ~aterlYay Restretched Feasibility Study: Interim Report National Research Council (NRC). 1999. Downstream: Adaptive Man- agement of Glen Canyon Dam and the Colorado River Ecosystem. Washington, DC: National Academy Press. National Research Council. 2001. Inland Navigation System Planning: The Upper Mississippi River-Illinois Waterway. Washington, DC: National Academy Press. National Research Council. 2002. The Missouri River Ecosystem: Explor- ing the Prospects for Recovery. Washington, DC: National Academy Press. Sparks Companies, Inc. 2002. Upper Mississippi River and Illinois Water- way Navigation Study. Economic Scenarios and Resulting Demand for Barge Transportation. Final Report. Memphis, TN. U.S. Army Corps of Engineers (USAGE). 2002. Interim Report for the Restructured Upper Mississippi River-Illinois Waterway System Navi- gation Feasibility Study. Rock Island, IL: Rock Island District Corps of Engineers. U.S. Army Corps of Engineers. 2003a. Upper Mississippi River-Illinois Waterway System Navigation Study: Responses to February 2001 NRC Review. U.S. Army Corps of Engineers. 2003b. Monthly Status Report. Upper Mississippi River-Illinois Water System Navigation Study. Rock Island, IL: Rock Island District Corps of Engineers. U.S. Department of Agriculture (USDA). Various dates. Agricultural Sta- tistics. National Agricultural Statistics Service. Washington, DC: U.S. Government Printing Office. U.S. Geological Survey (USGS). 1999. Ecological Status and Trends of the Upper Mississippi River System 1998. U.S. Geological Survey. 2000. Upper Mississippi Environmental Manage- ment Program: Habitat Needs Assessment. http://uJwuJ.~mesc. ~sgs.gov/- habitat_needs_assessment/ .
