00461nam a22001697a 4500 116890 116889 OSt 20260706112958.0 201113b ||||| |||| 00| 0 eng d 9788122413007 539 GUP Gupta,M C 573 Atomic and molecular spectroscopy by Gupta M C Newdelhi Newage 2016 466p. Wave mechanics Raman spectra Symmetry & group theory ddc BK