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Hearing Aids, Lipreading, and Clear Speech

Sir Alexander William Gordon EwingLady Ethel Constance Goldsack Ewing

出版	Manchester University Press, 1967
主題	Language Arts & Disciplines / Sign Language
URL	http://books.google.com.hk/books?id=STS8AAAAIAAJ&hl=&source=gbs_api
EBook	SAMPLE