TY  - JOUR
A1  - Coall, D.A.
A1  - Meier, M.
A1  - Hertwig, R.
A1  - Wanke, M.
A1  - Hopelinger, F.
T1  - Grandparental investment: The influence of reproductive timing and family size
Y1  - 2009
DO  - 10.1002/ajhb.20894
VL  - 21

ER  -