1. Bethe, H.A., and R. F. Bacher: Nuclear Physics A (Stationary states of Nuclei). Rev. Mod. Phys. 8, 82 (1936).
2. Bethe, H. A.: Nuclear Physics B (Nuclear Dynamics, Theoretical). Rev. Mod. Phys. 9, 69, (1937).
3. Livingston, M.S., and H. A. Bethe: Nuclear Physics C (Nuclear Dynamics, Experimental). Rev. Mod. Phys. 9, 245 (1937).
4. This is the basic review article, which for many years was the only general account of the subject available. Part C contains a very useful discussion of the earlier experimental methods and many tables and graphs of nuclear data.
5. Devons, S.: The Excited States of Nuclei. Cambridge: University Press 1949. — An excellent monograph both on experimental methods and theoretical interpretation.