273. New Castle County Department of Planning. The Brandywine Valley Scenic River and Highway Study, 1987.

273. New Castle County Department of Planning. The Brandywine Valley Scenic River and Highway Study, 1987., Box: 31. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/191926 Accessed September 19, 2024.