Inventory selective information-services.Selective 
Inventory of Information Services. 
Prepared by the Unesco Social Science Documentation 
Centre••• Inventaire selectif des 
services d'information••• Inventario selecti 
vo de serviciojs de informacb6n••• -(Paris): 
Unesco (1981). XXI, 140 S. 8 
(World social science information services. 
3:-)