00545cam 2200205 450 1786417http://id.bnportugal.gov.pt/bib/porbase/178641720030618123000.00-7167-0453-641366PTBN0049553219840424d1974 k y0pory0103 baengUSBasic algebraNathan JacobsonSan FranciscoW. H. Freeman1974XVI, 472 p512medeng292016JacobsonNathan191098PTBNRPCC. 27.38coopucmamq1320226bccoopucma167320UCMA4-199