FAO Irrigation and drainage papern 17-19 

 - Rome: FAO.,  1972 
 - Various paging 
 - FAO Irrigation and drainage paper no; 17-18 .
<br/><br/>17. Man's influence on the hydrological cycle. 18. Groundwater seminar Granada. 19. Mathematical models in hydrology 
<br/><br/><br/>Eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IRRIGATION.<br/>DRAINAGE.