European Nitrogen Service programme, New Delhi. <br/><br/>
NPK in Indian agriculture, 1971-1975; a bibliography of Nitrogen, Phosphorus, Potassium and related factors in crops, soils, fertilisers and manures   
Compiled by H. L. S. Tandon 
 - New Delhi  The Auth.  1978 
 - xxxii, 797p. Index 
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>338.16016  / Eu89.NP