1. Bellinger, D.C., Needleman, H.L., Leviton, A., Waternaux, C., Rabinowitz, M.B. and Nichols, M.L. (1984) Early sensory-motor development and prenatal exposure to lead. Neurobehav. Toxicol. Teratol, 6, 387–402
2. Bornschein, R.L. (1985) Influence of social factors on lead exposure and child development. Environ. Health Perspert, 343–351
3. Bradley, R. and Caldwell, B. (1976a) Early home environment and changes in mental test performance in children from 6 to 36 months. Dev. Psychol, 12, 93–97
4. Bradley, R. and Caldwell, B. (1976b) The relation of infants’ home environments to mental test performance at fifty-four months: a follow-up study. Child Dev, 47, 1172–1174
5. Caldwell, B., Heider, J. and Kaplan, B. (1966) The inventory of home stimulation. Paper presented at the meeting of the American Psychological Association