361. U.S. Army Corps of Engineers. Chesapeake & Delaware Canal. Philadelphia, Pa.: U.S. Army Engineer District, n.d. T0.4/No. 1

361. U.S. Army Corps of Engineers. Chesapeake & Delaware Canal. Philadelphia, Pa.: U.S. Army Engineer District, n.d. T0.4/No. 1, Box: 37. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/192234 Accessed September 19, 2024.