402. William J. Cohen and Associates, Inc. Recreational Potential of the Christina River New Castle County, Delaware. Newark, Del.: William J. Cohen and Associates, Inc., 1981.

402. William J. Cohen and Associates, Inc. Recreational Potential of the Christina River New Castle County, Delaware. Newark, Del.: William J. Cohen and Associates, Inc., 1981., Box: 39. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/192310 Accessed September 19, 2024.