Numeros racionales 6  
National Council of Teachers of Mathematics ; traduccion de Federico Galvan Anaya 
 - Mexico    Trillas 
 - 87 p. 
<br/><br/> Traduccion de : Topics in mathematics for elementary school Teachers 
<br/><br/><label>ISBN: </label>9682400988 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1. Aritmetica - Fundamentos
<br/><br/><label>LC Class. No.: </label>QA248.3 N271n n° 6