The Professional Status of Boys' Interscholastic League Athletic Coaches of Northeast Texas in Relation to the American Association for Health, Physical Education, and Recreation's Recommendations for Certification, thesis, August 1975; (https://digital.library.unt.edu/ark:/67531/metadc663246/m1/4/: accessed June 1, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .