TY  - RPRT
A1  - Kohler, H.-P.
A1  - Skytthe, A.
A1  - Christensen, K.
T1  - The age at first birth and completed fertility reconsidered: Findings from a sample of identical twins
Y1  - 2001
PB  - Max Planck Institute for Demographic Research
CY  - Rostock
IS  - MPIDR Working Paper WP-2001-006

ER  -