Library of Congress, National Referal Center    Diretory of information resources in the United States  

 - Washington  Library of Congress        1974 
 - iv, 416p.  cm. 
<br/><br/><label>Standard No.: </label>16503 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GENERALIA
<br/><br/><label>Dewey Class. No.: </label>n73,N67, L4 (RR)