title: Negro-white differences in children's movement.
mesh_terms: D001741:Black or African American; D002652:Child Behavior; D002657:Child Development; D002675:Child, Preschool; D006801:Humans; D009043:Motor Activity; D009068:Movement; D010988:Play and Playthings; D012919:Social Behavior; D012923:Social Class; D013637:Tape Recording; D013690:Television; D044465:White People