00308nam a2200121Ia 4500082001600000100002100016245002600037260005400063300002700117490003200144500000500176700000500181  a512bJ17.TR  aJacobson, Nathan  aThe theory of ringsb  aRhode IslandbAmerican Mathematical Societyc1943  avi, 150p. Index. Bibl.  aMathematical surveysv no.2  a  a