TY  - BOOK
AU  - Rogers,Daniel C.
TI  - Rates of return to education in the United States : : a theoretical and empirical study / 
U1  - AF PSF 338.9676 N36 no.51 
PY  - 1967///
CY  - Nairobi : 
PB  - Institute for Development Studies, 
KW  - Educational productivity
KW  - United States
ER  -