Beek, J. <br/><br/>
Simulation of nitrogen behavior in soils 
by  J. Beek and M. J. Frissel 
 - Wageningen  Centre for Agricultural Publishing and Documentation  1973 
 - 67p.: ill.,tables;  20cm. 
 - Simulation monographs .
<br/><br/><label>Dewey Class. No.: </label>581.5  / BEE