Infancy to early childhood genetic and environmental influences on developmental change - Emde, Robert N.; Hewitt, John K.; Kagan, Jerome; ebrary, Inc. (Oxford ; New York : Oxford University Press, 2001)
Includes bibliographical references and index.
Electronic reproduction.
Keywords: Twins -- Psychology; Twins -- Longitudinal studies; Nature and nurture -- Longitudinal studies; Child psychology; Toddlers -- Psychology; Electronic books