The World Bank, <br/><br/>
World And regional Supply and Demand Balances for Nitrogen, Phosphate, and Potash , 1989/90- 1995/96; 

 - Washington, D.C:  World Bank,  1991. 
<br/><br/><label>ISBN: </label>0821318829 
<br/><br/><label>Dewey Class. No.: </label>338.4766  / WOR.N1