TY - BOOK T1 - El mundo del numero E.G.B. 4 A1 - Oehl,W. A1 - Palzkill,L. LA - Spanish PP - santiago PB - Editorial Discalia YR - 1983 UL - https://glotrec.wdi-testing.gei.de/cat/Record/manes91527 OP - 104 ER -