000 00275nam a22001217a 4500
020 _a9780521332460
082 _a512.2
_bLED.I
100 _aLedermann,Walter
245 _aIntroduction to Group characters
250 _aSecond
260 _aNewYork
_bCUP
_c1987
942 _cBK
999 _c694877
_d694877