TY  - JOUR
A1  - Coall, D.A.
A1  - Meier, M.
A1  - Hertwig, R.
A1  - Wänke, M.
A1  - Höpflinger, F.
T1  - Grandparental Investment: The Influence of Reproductive Timing and Family Size
Y1  - 2009
DO  - 10.1002/ajhb.20894
JF  - American Journal of Human Biology
VL  - 21
IS  - 4

ER  -