1. Anthropometric study of male extended genitalia of 320 healthy Nigerian adults;Ajmani;Anthropologisher Anzeiger,1985
2. The twinning and fertility paradox;Allen,1981
3. AIDS: Statistics but few answers;Barnes;Science,1987
4. Relation between testosterone concentration, sex role identity, and personality among females;Baucom;Journal of Personality and Social Psychology,1985
5. Twins reared together and apart: What they tell us about human diversity;Bouchard,1984