Sperling, Abraham <br/><br/>
Made simple self-teaching encyclopedia / 
A. Sperling and M. Stuart. 
 - New revised and enlarged ed. 
 - New York :  Cadillac Publ. Co., Inc.,  1962. 
 - 192 p. 
<br/><br/> Sperling, Abrahamr  Vol. 1