000 00301nam a2200133Ia 4500
008 230917s9999||||xx |||||||||||||| ||und||
040 _e90124
_aMAIN
041 _aEnglish
082 _a512.4 G959T
100 _aGupta, Archana
245 0 _aTrace map in group rings
300 _a79 p.
942 _cTH
999 _c71757
_d71757