00733nam0-22002771i-450-9900039169304033210-87249-189-7000391693FED01000391693(Aleph)000391693FED0100039169320020710d1971----km-y0itay50------baengGBInvestment in human capitalKiker1971ColumbiaUniversity of south carolina press1971608 p22 cmKiker,B. F.124888ITUNINARICAUNIMARCBK990003916930403321A02.206221DECTSDECTSInvestment in human capital515908UNINA