Social science methods, decision- making and development planning / 
John Robinson...(et al.) 
 - París :  UNESCO,  1984. 
 - 103 p. 
 - Socio-economic studies ; .
<br/><br/><label>ISBN: </label>9231022075 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>3.002.1: 338 =20 SOC No.8.