x   x  <br/><br/>
Instructional aids in mathematics ; thirty-fourth yearbook  x 

 - x  
 - Washington   National Council of Teachers of Mathematics  1973 
 - xvi, 442p.  
<br/><br/>
<br/><br/><label>ISBN: </label>x     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics - Study and Teaching National Council of Teachers of Mathematics  
<br/><br/><label>Dewey Class. No.: </label>Ref. 510.7/INS