title: Acquisition of prepositions in language-delayed preschoolers: is intervention effective?
mesh_terms: D002663:Child Language; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007804:Language Development; D007805:Language Development Disorders / Q000628:therapy*; D007808:Language Therapy; D008297:Male; D014825:Vocabulary