Encyclopaedia britannica 

 - Chicago  Willam benton London        1973 
 - 1193p  cm. 
 -  V20 .
<br/><br/><label>Standard No.: </label>7,158 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>33:L68, J5;L3.20