Chapman, Cynthia B. An Analysis of Federal Sickle Cell Disease Program FY 1971 - FY 1976, report, April 11, 1975; (https://digital.library.unt.edu/ark:/67531/metadc992938/m1/1/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .