1. Home environment and cognitive development in a healthy, low risk sample;Barnard,1984
2. Early intervention programs;Beller,1979
3. The ecology of human development;Bronfenbrenner,1979
4. Organism-environment from an ecological perspective;Bronfenbrenner,1985
5. Early home environment and changes in mental test performance from 6–26 months;Bradley;Developmental Psychology,1976