Brueckner, Leo J.    1890-1967 <br/><br/>
How to make arithmetic meaningful /    
by Leo J. Brueckner and Foste r E. Grossnickle. 
 - Chicago :   The John C. Winston Co.,   1947. 
 - v, 513 p. :    ill., diagrs. ;    22 cm. 
<br/><br/>Includes bibliographical references.