Home environment and cognitive development in the first 3 years of life: A collaborative study involving six sites and three ethnic groups in North America
Robert H. Bradley, Bettye M. Caldwell, Stephen L. Rock, Craig T. Ramey, et al
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Robert H. Bradley, Bettye M. Caldwell, Stephen L. Rock, Craig T. Ramey, et al. "Home environment and cognitive development in the first 3 years of life: A collaborative study involving six sites and three ethnic groups in North America." Developmental Psychology 25.2 (1989) 217-235