Proceeding on the chemistry 

 -  1969 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>68373 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry
<br/><br/><label>Dewey Class. No.: </label>Ep2:N69, K9.2-;1