NPK in Indian agriculture (1971 - 1975) 

 - New Delhi:   European Nitrogen Service Programme,   1975 
 - xxxii, 797p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management
<br/><br/><label>Subjects--Index Terms: </label>Agriculture 
<br/><br/><label>Universal Decimal Class. No.: </label>R 016:632.82  / L8