title: SOME VARIABLES IN SPEECH AND LANGUAGE DEVELOPMENT IN NORMAL CHILDREN.
mesh_terms: D044383:Black People; D002648:Child; D006128:Growth; D006801:Humans; D007802:Language; D007804:Language Development; D012924:Social Conditions; D013060:Speech; D013064:Speech Disorders; D014310:Triplets; D014427:Twins; D044465:White People
keywords: CAUCASIAN RACE; CHILD; GROWTH; LANGUAGE; NEGROES; SOCIAL CONDITIONS; SPEECH; SPEECH DISORDERS; TRIPLETS; TWINS