HASL (New York, N.Y.). Health and Safety Laboratory Fallout Program Quarterly Summary Report: September 1, 1973 - December 1, 1973, report, January 1, 1974; (https://digital.library.unt.edu/ark:/67531/metadc101009/m1/1/: accessed April 20, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .