Vaughn, Gwenyth R. Speech facilitation : extraoral and intraoral stimulation technique for improvement of articulation skills / by Gwenyth R. Vaughn and Ruth Millburn Clark. - Springfield, Ill. : Thomas, c1979. - xix, 277 p. : ill. ; 24 cm. Includes index. Bibliography p. 244-252. ISBN: 0398038287 LCCN: 78016171 Subjects--Topical Terms: Articulation disorders.Speech therapy.Phonetics. LC Class. No.: RC424.7 / .V38 Dewey Class. No.: 616.85506 VAU C