Spectroscopic and group theoretical methods in physics : Racah memorial volume / Edited by F. Bloch [and others]. Racah, G. (Giulio), 1909-1965,. Bloch, Felix, 1905-, ed. Nuclear physics. QC173 .S59 535.84 BLS Includes bibliographies. New York : Wiley Interscience Division, c1968. c1968. 1968 Text x, 462 p. : eng