Great Soviet Encyclopedia 

 - 3rd 
 - New York     MacMillan        1973 
 -  V1/xxxv,678p .
<br/><br/><label>Standard No.: </label>92772 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>k58,N5, L3.1-.22-.24,.26-.28,.30-.31  RR