00781nam0-2200241 --450 991063919500332120230124175652.020230124d1968----kmuy0itay5050 baengUS 001yyToward improved social and economic measurementforty-eight annual report, June 1968NBERNew YorkNational bureau of economic research1968IX, 111 p.26 cm330.01823itaStati Uniti d'America: National bureau of economic researchITUNINAREICATUNIMARCBK9910639195003321XV C 57 (48)85290FGBCFGBCToward improved social and economic measurement3003601UNINA