Asimov, Isaac. <br/><br/>
The world of Nitrogen / 
Isaac Asimov. 
 - New. rev. ed. 
 - New York :  Collier Books,  c 1962. 
 - 155 p. ;  18 cm. 
<br/><br/> Includes Index 
<br/><br/>392  392 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry, Organic.<br/>Nitrogen.
<br/><br/><label>Dewey Class. No.: </label>547.04 / A42w