00708cam 2200229 450 1865157http://id.bnportugal.gov.pt/bib/porbase/186515720030529050700.00-387-96115-1Encadernado25808PTBN0083729219891017d1985 k y0pory0103 baengUSToposes, triples and theoriesMichael Barr, Charles WellsNew YorkSpringer-Verlagcop. 1985XIII, 345 p.il.25 cmGrundlehren der mathematischen Wissenschsffen278512.58inteng1381484BarrMichael1430745WellsCharles0701430746PTBNRPCBGUM 512.58coopUMSDmq1008588bccoopUMSD517590MSD4-153