Steele, R.S. Jr.; Casstevens, J.M. & Sutton, B.J. Oak Ridge Flywheel Evaluation Laboratory. Annual report, April 1, 1979-September 30, 1979, report, December 1, 1979; (https://digital.library.unt.edu/ark:/67531/metadc1093117/m1/1/: accessed March 20, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .