SODIUM-COOLED REACTORS FAST CERAMIC REACTOR DEVELOPMENT PROGRAM. Thirty- Eighth Quarterly Report, February 1971--April 1971., report, January 1, 1971; (https://digital.library.unt.edu/ark:/67531/metadc1036018/m1/1/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .