Asimov. Isaac. <br/><br/>
The world of nitrogen / 
Isaac Asimov. 
 - London :  Abelard-Schuman,  1958. 
 - 160 p. :  ill. ;  20 cm. 
<br/><br/><label>LCCN: </label>5811066 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen.<br/>Nitrogen compounds.