000 00293pam a2200121 a 4500
020 _c
041 _aeng
100 _aRichards.W.G.
245 _aEnery Levels In Atoms And Moelcules
_hTextual Documents
260 _aNew Delhi
_bOxford University Press
_c1994
300 _a88p.
930 _a13517
999 _c90418
_d90418