Williams,Trevor Illtyd.  <br/><br/>
The chemical industry :  past and present / 
Trevor Illtyd Williams. 
 - London :   Penguin books,    1953. 
 - 190 p. ;  19 cm. 
<br/><br/>96  96 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical industry.
<br/><br/><label>Dewey Class. No.: </label>660.942 / W671c