4. Advanced Planning Division, New Castle County Department of Planning. General Comprehensive Development Plan Middletown, Delaware. Wilmington, Del.: Advanced Planning Division, New Castle County Department of Planning, 1974. S9.2/No. 35

4. Advanced Planning Division, New Castle County Department of Planning. General Comprehensive Development Plan Middletown, Delaware. Wilmington, Del.: Advanced Planning Division, New Castle County Department of Planning, 1974. S9.2/No. 35, Box: 20. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/191338 Accessed September 18, 2024.