Instructional aids in mathematics. 

 - [Washington, DC]:  1973. 
 - xvi, 442 p.:  illus.,  29 cm. 
 - Yearbook,  34th. .
 - Yearbook (National Council of Teachers of Mathematics)  34th. .
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>76189323 //r933 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics---Study and teaching<br/>Teaching---Aids and devices
<br/><br/><label>Dewey Class. No.: </label>510.71  / N277i