Attachment, Positive Affect, and Competence in the Peer Group: Two Studies in Construct Validation

Everett Waters, Judith Wippman, L. Alan Sroufe, Attachment, Positive Affect, and Competence in the Peer Group: Two Studies in Construct Validation, Child Development, Vol. 50, No. 3 (Sep., 1979), pp. 821-829

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