The origins of human competence the final report of the Harvard Preschool Project
White, Burton Leonard.
Kaban, Barbara T.
Attanucci, Jane S.
Harvard Preschool Project.
Lexington, Mass. Heath [Farnborough, Hants.] [Distributed by] Teakfield Limited
1979
'Lexington Books'
Bibliography: p.427-429. - Includes index
Infant psychology.
Ability in children.