1. Adamson, L., 1977, Infants’ Response to Visual and Tactile Occlusions, PhD dissertation, University of California, Berkeley.
2. Als, H., 1975, The Human Newborn and His Mother: An Ethological Study of Their Interaction, PhD dissertation, University of Pennsylvania.
3. Als, H., 1976, unpublished data.
4. Als, H., and Lewis, M., 1975, The contribution of the infant to the interaction with his mother, paper presented at Society for Research in Child Development, Denver, Colorado.
5. Als, H., Tronick, E., Adamson, L., and Brazelton, T. B., 1976, The behavior of the fullterm but underweight newborn infant, Dev. Med. Child Neurol. 18:590–602.