TY  - CHAP
A1  - Vaupel, J.W.
A1  - Yashin, A.I.
T1  - Unobserved population heterogeneity
Y1  - 2006
A3  - Caselli, G.
A3  - Vallin, J.
A3  - Wunsch, G.
T2  - Demography: Analysis and synthesis; a treatise in population studies
CY  - Amsterdam
PB  - Elsevier
SP  - 271
EP  - -278

ER  -