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
1989 Developmental Psychology  
doi:10.1037/0012-1649.25.2.217 fatcat:lq2wz2savvdwjbf5be5katqxzu