Heckmann, P.H . Introduction to the spectroscopy of atoms / P.H. Heckmann and E. Trabert; translated by S. Bashkin. - New York : Elsevier Science , 1989. - x,284p. : ills. ; 23cm . Include index ISBN: 0444869492 NULL Subjects--Index Terms: SPECTROSCOPY Dewey Class. No.: 535.84 / HEC/I