TY  - CHAP
A1  - Heckman, J.J.
A1  - Singer, B.S.
T1  - Population Heterogeneity in Demographic Models
Y1  - 1982
DO  - 10.1016/B978-0-12-435640-5.50018-3
A3  - Land, K.C.
A3  - Rogers, A.
T2  - Multidimensional Mathematical Demography
CY  - New York
PB  - Academic Press
SP  - 567
EP  - -599

ER  -