Population and the labour force in rural economics 
/ Food and Agriculture Organization of the United Nations  
. - Rome  : FAO, 1985
. - V-169 p.   : ill., couv. ill.   ; 30 cm. 
<br/><br/><label>Source: </label> Fonds Facagro 
<br/><br/><label>Universal Decimal Class. No.: </label>631.1