Visible speech [by] Ralph K. Potter, George A. Kopp [and] Harriet C. Green.
Contributors: Kopp, George Adams, 1900-,; Kopp, Harriet C. Green, 1917-
Edition: [1st ed.]
Series: The Bell Telephone Laboratories series
Publisher: D. Van Nostrand Co.
Published: 1947
Place of publication: New York
Language: eng
Number of pages: 441
Subjects: Deaf -- Means of communication; Speech; Telephone -- Apparatus and supplies