231. Lewis, Harold M. How New Castle County Uses Its Land: A Graphic and Descriptive Analysis as the First Step in a County Master Plan: Regional Planning Commission of New Castle County, Delaware, 1956. S1.3/No. 2

231. Lewis, Harold M. How New Castle County Uses Its Land: A Graphic and Descriptive Analysis as the First Step in a County Master Plan: Regional Planning Commission of New Castle County, Delaware, 1956. S1.3/No. 2, Box: 29. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/191849 Accessed September 19, 2024.