Wouters, A.; Schwob, J.L.; Suckewer, S.; Seely, J.F.; Feldman, U. & Dave, J.H. Spectra in the 60 )angstrom) to 345 )angstrom) wavelength region of elements injected into the PLT tokamak, report, March 1, 1988; (https://digital.library.unt.edu/ark:/67531/metadc1054048/m1/1/: accessed August 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .