Numeros Enteros 2 National Council of Teachers of Mathematics, U.S.A. ; traduccion de Federico Galvan Anaya - Mexico: Trillas 1968 - 65 p. - ( Temas de matematicas 2) . ISBN: 9682400872 Subjects--Topical Terms: 1. Teoria de los numeros LC Class. No.: QA241 N271n n°2