TY  - CHAP
A1  - Hawkes, K.
A1  - O’Connell, J.F.
A1  - Blurton Jones, N.G.
T1  - Hardworking Hadza grandmothers
Y1  - 1989
A3  - Standen, V.
A3  - Foley, R.A. 
T2  - Comparative socioecology: The behavioural ecology of humans and other mammals
CY  - Oxford
PB  - Blackwell

ER  -