TY  - CHAP
A1  - Becker, G.S.
A1  - Lewis, H.G.
T1  - Interaction between quantity and quality of children
Y1  - 1974
A3  - Schultz, T. W.
T2  - Economics of the family: Marriage, children, and human capital
CY  - Chicago
PB  - University of Chicago Press

ER  -