The theory of groups and quantum mechanics / Hermann Weyl ; translated from the second (revised) German edition by H.P. Robertson ; with 3 diagrams. Weyl, Hermann, 1885-1955. Robertson, H. P. (Howard Percy), 1903-1961, tr. Group theory. Quantum theory. QA171 .W54 512.86 WET Includes index. Bibliography: p. 399-408. London : Methuen, 1930. 1930. 1930 Text xiv, 422 p. : eng engger