TY  - JOUR
A1  - Voland, E.
A1  - Dunbar, R.I.M.
A1  - Engel, C.
A1  - Stephan, R.
T1  - Population increase and sex-biased parental investment in humans: Evidence from 18th- and 19th-century Germany
Y1  - 1997
DO  - 10.1086/204593
JF  - Current Anthropology
VL  - 38
IS  - 1
SP  - 129
EP  - -135

ER  -