Jassby, D.L. & Imel, G.R. Fusion energy calorimeter for the tokamak fusion test reactor, report, April 1, 1981; (https://digital.library.unt.edu/ark:/67531/metadc1211995/m1/1/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .