International chemistry directory 

 - New York  W. A. Benjamin  1969 
 - v. ; 24 cm. 
<br/><br/><label>ISBN: </label>0805303758 
<br/><br/><label>LCCN: </label>77-099509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry--Directories