Lanning, D. D.; Busselman, G. J.; Bennett, C. L.; Newman, D. F. & Bierman, S. R. PCTR Integral Measurements of $sup 239$Pu Alpha (anti $alpha$) In Fast Spectra, report, January 1, 1968; (https://digital.library.unt.edu/ark:/67531/metadc1027793/m1/1/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .

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