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