Sample Survey of Current Intrent 1964 (U.S). 10th Reprt. 

 - U.N  United State Publication          1967 
 - 383p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Em1 N45, N61, K1.10