78. Delaware State Planning Office. "1969 Annual Report." Dover, Del. 1969. A5.5/No. 1

78. Delaware State Planning Office. "1969 Annual Report." Dover, Del. 1969. A5.5/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/191646 Accessed September 19, 2024.