Taylor, Hugh M., Jr.; Poplin, Jack K. & Mitchell, Gerald B. Investigation for South Fill Area, United States Military Academy, West Point, New York, report, August 1980; (https://digital.library.unt.edu/ark:/67531/metadc303971/m1/92/: accessed July 16, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .