Eicholz, Robert E. <br/><br/>
Elementary school mathematics :  getting ready 4 / 
Robert E. Eicholz, Phares G. O'Daffer. 
 - 2a ed. 
 - Menlo Park [E.U.A.] :  Addison-Wesley,  1968. 
 - 48 p. :  il. 
 - Elementary school mathematics series .
<br/><br/> "Teacher's edition" 
<br/><br/><label>Encabezamiento--Tema: </label><br/>MATEMATICAS ---ESTUDIO Y ENSEÑANZA (ELEMENTAL) ---ESTADOS UNIDOS