TY  - JOUR
A1  - Trivers, R.L.
A1  - Willard, D.E.
T1  - Natural selection of parental ability to vary the sex ratio of offspring
Y1  - 1973
DO  - 10.1126/science.179.4068.90
JF  - Science
VL  - 179
SP  - 90
EP  - -92

ER  -