65. Crosswhite, William M. and Gerald F. Vaughn. Suburban Development in Metropolitan Northern Delaware. Newark, Del.: University of Delaware, Cooperative Extension Service, 1966. S1.3/No. 1

65. Crosswhite, William M. and Gerald F. Vaughn. Suburban Development in Metropolitan Northern Delaware. Newark, Del.: University of Delaware, Cooperative Extension Service, 1966. S1.3/No. 1, Box: 23. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/191621 Accessed September 18, 2024.