Visible speech
Potter, Ralph K.
Visible speech Ralph K. Potter - New York : D. Van Nostrand company, 1947. - xvi, 441 p. ; 28 cm.
Speech
Deaf--Means of communication
Telephone--Equipment and supplies
English language--Pronunciation
Phonetics
414 POT
Visible speech Ralph K. Potter - New York : D. Van Nostrand company, 1947. - xvi, 441 p. ; 28 cm.
Speech
Deaf--Means of communication
Telephone--Equipment and supplies
English language--Pronunciation
Phonetics
414 POT