00688nam0 22002411i 450 99000732191040332120181025141556.0000732191FED01000732191(Aleph)000732191FED0100073219120021010d1969----km-y0itay50------baitaAggregation in economicsa theoretical and empirical studyK. L. GuptaRotterdamRotterdam University Press1969Gupta,L.K.415573ITUNINARICAUNIMARCBK990007321910403321XV I 612148DTEDTEAggregation in economics1534675UNINA