Final report on a soil fertility survey and the establishment of a s oil fertility unit in Iran /    
FAO 
 - Rome :   Food and Agriculture Organization of the United Nations [a nd] United Nations Development Program,   1966. 
 - v. :    illus., maps. ;    28 cm. 
<br/><br/>  "FAO/SF: 20/IRA." 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil fertility--------