000 00290nam a2200109Ia 4500
001 103788
008 170722s9999 xx 000 0 und d
100 _aSchultz, Thedore W.
245 _aInvestment in human capital
_bThe role of education and of research /
260 _c1971.
942 _cGEN
999 _c86835
_d86835