Lackey, W.J.; Pechin, W.H. & Sease, J.D. Remote coating of HTGR fuel particles, article, January 1, 1973; (https://digital.library.unt.edu/ark:/67531/metadc1028225/m1/1/: accessed April 24, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .