Encyclopaedia Britanica, Vol- 21 Sordello to Texas /  Textual Documents 
Encyclopaedia Britanica,Ltd. 
 - London :  Encyclopaedia Britanica,Ltd ,  1960. 
 - 991p ;  29cm. 
<br/><br/><label>Subjects--Index Terms: </label>Encyclopaedia Britanica T/Ref-Knowledge 
<br/><br/><label>Dewey Class. No.: </label>001  / En 19