TY  - BOOK
AU  - Fisher,Helen E.
TI  - The sex contract: the evolution of human behaviour 
SN  - 0246117680
PY  - 1982///
CY  - London
PB  - Granada
KW  - Sex customs
KW  - Human evolution
KW  - Behavior evolution
N1  - Bibliography: p165-172
ER  -