ROTMAN, Joseph J., A first course in abstract algebra : With applicatins - 3rd ed - Upper Saddle River, N.J. : Pearson Prentice Hall, 2006. - xvii , 581, [39] p . : ill . ; 23 cm. includes index ISBN: 0131862677 Subjects--Topical Terms: Algebra, AbstractNumber theoryCommutative ringsGroup rings Dewey Class. No.: 512.02