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4. M. D. Goldberg, V. M. May, and J. R. Stern: Angular Distribution in Neutron Induced Reactions, Bnl 400,2nd Ed. (1962).
5. E. P. Blizard and L. S. Abbott (Eds.): Reactor Handbook, 2nd Ed., Vol. Iii, Part B “Shielding”, New York: Interscience Publishers 1962.