9. Advanced Planning Division, New Castle County Regional Planning Commission. Economic Characteristics: A County Comprehensive Development Plan Background Study. Wilmington, Del.: Advanced Planning Division, New Castle County Regional Planning Commission, 1967. S9.3/No. 7/Vol. 8

9. Advanced Planning Division, New Castle County Regional Planning Commission. Economic Characteristics: A County Comprehensive Development Plan Background Study. Wilmington, Del.: Advanced Planning Division, New Castle County Regional Planning Commission, 1967. S9.3/No. 7/Vol. 8, Box: 20. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/191343 Accessed September 18, 2024.