(Paris, 1939). Royal8vo. Orig. full cloth with dustjacket. XXI,247 pp.
With original contributions by Niels Bohr (The causality problems in atomic physics), L. de Broglie (Links between the quantum theory and relativity), O. Klein (On the theory of charged fields), L. Brillouin (Individuality of elementary particles...), A.S. Eddington (Cosmological application of the theory of quanta), E.A. Milne (A possible mode of approach to nuclear dynamics).
Order-nr.: 38592