Heinke, Clarence H.  1912- <br/><br/>
Fundamental concepts of elementary mathematics 
Clarence H. Heinke. 
 - Encino, Calif.,  Dickenson Pub. Co.  1970 
 - xviii, 348 p.  illus. ,  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Foundations.