000 00282 a2200121 4500
080 _a512
_bB 419 R
245 1 _aRing theory
_cby E.A. Behrens
260 _aNew York
_bAcademic Press
_c1972
650 _aRing theory
100 1 _aBehrens, E.A.
_d
300 _a320 p.
901 _a125408
999 _c65799
_d65799