Barnett, Raymond A. Algebra / Raymond A. Barnett / Michael R. Ziegler / Karl E. Byleen - 6a Ed - Mexico : McGraw-Hill , 1999 - 657 p : il ISBN: 970-10-2967-4 Subjects--Topical Terms: Warren, Howard C. , 1867-1934 Dewey Class. No.: REF 512 BAR