On the psychological attachment of infants to their mothers.
D000367:Age Factors; D002652:Child Behavior; D002657:Child Development; D002675:Child, Preschool; D004644:Emotions; D005106:Exploratory Behavior; D005260:Female; D006801:Humans; D007223:Infant; D008124:Locomotion; D008131:London; D008297:Male; D009034:Mother-Child Relations; D009043:Motor Activity; D009769:Object Attachment; D009949:Orientation; D012919:Social Behavior; D013037:Spatial Behavior