Kurbatov, M. H. & Kurbatov, J. D. STUDY OF COMPLEX BETA DECAY SPECTRA. Report No. 4 (Progress) for May 16, 1959-May 15, 1960, report, June 1, 1960; (https://digital.library.unt.edu/ark:/67531/metadc869190/m1/1/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .