Voice disordersde Perkins, William H.MateriasTreatmentVoice disordersTherapyDysphonieStimmstörungVoice TrainingSpeech TherapyEdiciones (1)Voice disorders (1983)Thieme-Stratton · inglésMás obras de Perkins, William H.Jacobite minstrelsy...Nature and treatment of stutteringPhonologic-articulatory disorders