Universal decimal classification. International 

 - 4th 
 - London  British standards Institutions       1971 
 - 26p.  cm. 
<br/><br/> Contents UDC 668 various organic chemical industries 
<br/><br/><label>Standard No.: </label>6,569 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2:51M96, qL17-;13 (2)