00539cam 2200205 450 1794291http://id.bnportugal.gov.pt/bib/porbase/179429120030618181700.00-486-65620-934528PTBN0048777519920716d1988 k y0pory0103 baengUSNumber theory and its historyOystein OreNew YorkDover1988370 p511(091)BNpor1434746OreOystein179781PTBNRPC51-C/40coopIPLBJmq1310705bccoopIPLBJ127840ESE12-56