William J. Barry and
C. Gutknecht. Model for Remedial Courses in English Phonetics at German Universities. In Linguistische Berichte, Vol. 7:74-79, 1970. google
William J. Barry. Parallel Encoding as a Source of Interference: An Investigation of the Final-Voiced Consonant Problem in English. In
C. Gutknecht editor, Contemporary English: Occasional Papers, Pages 107-117, Lange, Frankfurt a. M., 1976. google
William J. Barry. Some Areas of Applied Phonetics. In
C. Gutknecht editor, Grundbegriffe und Hauptströmungen in der Linguistik, Pages 53-94, Hoffmann und Campe, Hamburg, 1977. google