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2. F. L. PETREE, U. S. Atomic Energy Report IDO-16470 (1959), Available from the office of Technical Services, U. S. Department of Commerce, Washington 25, D. C.
3. Neutron Resonance Measurements of Ag, Ta, andU238
4. R. D. EVANS, “The Atomic Nucleus,” p. 785 ff. McGraw-Hill, New York, 1955.