Directory of institutions engaged in arid zone research. 

 - Paris :   Unesco,  c 1953. 
 - viii, 110 p. :  ill. ;  24 cm. 
<br/><br/>333  333 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Societies.
<br/><br/><label>Dewey Class. No.: </label>333.73 / D628