The great international : "math on keys" book 

 - New York :  Texas Instruments Learning Center,   1976 
 - [155] p. :  ilus., grafs 
<br/><br/><label>Source: </label>donación 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MATEMÁTICAS<br/>APRENDIZAJE<br/>TECNOLOGÍA
<br/><br/><label>Dewey Class. No.: </label>BIB-TELLO/18.08.01/0422