00334nam a2200121Ia 4500082001700000100002200017245004600039260003800085300002000123490005900143500000500202700000500207  a512bW645.RS  aWiegandt, Richard  aRadical and semisimple classes of ringsb  aOntariobQueen's Universityc1974  aiv, 248p. Index  aQueen's papers in Pure and Applied Mathematicsv no.37  a  a