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The rate of return in allocation investment resources to ed..:

, In: Journal of human resources / publ. under the ausp. of the International Relations Research Institute and the Institute for Research on Poverty
Schultz, Theodore William. (1967)  3 - p. 293-309
Exemplar:  Zentrale:E02 z sow 006/856; Zentrale:Magazin Zs fc 4856