00540nam a2200193Ia 4500082001700000100001900017245002700036260003400063300001600097490003900113500003500152500000500187690000600192700000500198952009900203964001700302921001000319999001700329  a512bP495.RS  aPetrich, Mario  aRings and semigroupsb  aBerlinbSpringer-Verlagc1974  aviii, 182p.  aLecture notes in Mathematicsv 380  a"Appendix by Richard Wiegandt"  a  a   a  00104070aISIbISId1998-09-10l0o512 P495.RSpDP14537r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a10192  c10192d10192