Browsing by Author "Spilka, Walter"
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- Navigation user charges : impact on the transportation of agricultural productsBinkley, James K.; Shabman, Leonard A.; Havlicek, Joseph; Luppold, William G.; Stillman, Richard P.; Spilka, Walter; Kenyon, David E. (Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University, 1979)