Infant development in the Zinacanteco Indians of southern Mexico.
D002652:Child Behavior; D002657:Child Development; D002668:Child Rearing; D006801:Humans; D007198:Indians, North American; D007223:Infant; D007231:Infant, Newborn; D008800:Mexico; D009034:Mother-Child Relations; D009043:Motor Activity; D011581:Psychological Tests