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Your query returned 6 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results.

3.
National Center for Early Development and Learning Multistate Study of Pre-Kindergarten, 2001-2003 (ICPSR 4283)
Clifford, Dick; Bryant, Donna; Burchinal, Margaret; et al.
5.
Office of Head Start Program Information Report (PIR) (ICPSR 36847)
United States Department of Health and Human Services. Administration for Children and Families. Office of Head Start

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