486.1 River Conservation Directory. Washington, D.C.: U.S. Department of the Interior, 1994.

486.1 River Conservation Directory. Washington, D.C.: U.S. Department of the Interior, 1994., Box: 43. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/192557 Accessed September 19, 2024.