Atypical attachment in infancy and early childhood among children at developmental risk / edited by Joan I. Vondra and Douglas Barnett ; in collaboration with Sandra Pipp-Siegel ... [et al.]. - Malden, MA : Blackwell for the Society for Research in Child Development, 1999. - Monographs of the Society for Research in Child Development ; serial no.258, vol.64, no.3 .