00591nam a2200133Ia 4500082002400000100006900024110002700093245023600120260002100356300000600377490003400383500000500417710003500422  a309.251098bUn58.SA  aUnited Nations. Educational Scientific and Cultural Organisation  aVries, Egbert de ; ed.  aSocial aspects of economic deve. in Latin America; papers submitted to the expert working group on social aspects of economic deve. in Latin America; Maxico city, 12-21 Dec., 1960bcEd. by Egbert de Vries and Jose Medina Echavaria  aParisbThe auth.  a   aTechnology and Society series  a  aEchavaria, Jose Medina ;jt.ed.