Operator techniques in atomic spectroscopy / by, Brian R. Judd. Judd, Brian R. Atomic spectroscopy Mathematics. Calculus, Operational. Continuous groups. QC454.A8 J82 535.84 JUO Includes bibliography. New York : McGraw-Hill, c1963. c1963. 1963 Text ix, 242 p. : eng McGraw-Hill advanced physics monograph series McGraw-Hill advanced physics monograph series.