000 00300nam a2200133Ia 4500
008 190711s9999 xx 000 0 und d
020 _a0125998406
082 _a512.4 R878
100 _aROWEN,L.H
245 0 _aRING THEORY
260 _aOSTON
_bACADEMIC
_c1991
300 _a23X15
942 _cBK
_2DDC
999 _c24812
_d24812