المؤلفون: Schonberger, E. D.

المصدر: Quarterly Journal of Speech ; volume 16, issue 3, page 291-296 ; ISSN 0033-5630 1479-5779

الاتاحة: https://doi.org/10.1080/00335633009360889
http://www.tandfonline.com/doi/pdf/10.1080/00335633009360889