Smil, Vaclav <br/><br/>
Enriching the earth 

 -  1st ed. 
 - Cambridge  The MIT Press 
<br/><br/><label>ISBN: </label>9780262693134 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Ammonia as fertilizer<br/>Agriculture<br/>Nitrogen fertilizers
<br/><br/><label>LC Class. No.: </label>S651.S56