1. An experimental study of the relationship between the amount of nasal emission of air and judge nasality;Benson,1951
2. Air flow and air pressure studies. Proceedings of the conferences: Communicative problems in cleft palate;Hardy;ASHA Rep,1965
3. Techniques of measuring intraoral air pressure and rate of air flow;Hardy;J Speech Hear Res,1967
4. Development of a test for velopharyngeal competence during speech;Hardy;Cleft Palate J,1966
5. The pharyngeal flap operation in cleft palate;Skoog;Br J Plast Surg,1965