Schuske, C.L.; Bell, C.L.; Bidinger, G.H. & Smith, D.F. INDUSTRIAL CRITICALITY MEASUREMENTS ON ENRICHED URANIUM AND PLUTONIUM. PART II, report, January 10, 1962; (https://digital.library.unt.edu/ark:/67531/metadc1054387/m1/1/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .