User's Manual for the ECLS-K Third Grade. Public-Use Data File and Electronic Code Book. Early Childhood Longitudinal Study, Kindergarten Class of 1998-99. NCES 2004-001.

By Karen Tourangeau, Mike Brick, Thanh Lê, S. Wan, Maria M Weant, C. Nord, Nancy Vaden-Kiernan, Mary Hagedorn, Elizabeth Bissett, R. Dulaney and 9 more. 2004

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