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The Journal of Genetic Psychology|September 1, 1979
Infant development in father-absent familiesF A Pedersen, J L Rubenstein, L J YarrowChild Development|June 1, 1985
The organization of exploratory behavior in Down syndrome and nondelayed infantsR H MacTurk, P M Vietze, M E McCarthy, et al.The Journal of Genetic Psychology|September 1, 1982
Variety of cognitively oriented caregiver activities: relationships to cognitive and motivational functioning at one and 31/2 years of ageJ L Gaiter, G A Morgan, K D Jennings, et al.Pageof 1