Indian Statistical Institute, Planning Unit, New Delhi <br/><br/>
Optimum requirement of fertilizers for the fifth plan period   
By Kiriti S. Parikh and T. N. Srinivasan 
 - New Delhi  Indian Statistical Institute  1974 
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<br/><br/><label>Dewey Class. No.: </label>338.47631810954(5)  / In39.OR