Potter, Ralph K  <br/><br/>
Visible speech / 
by Ralph K Potter, George A Kopp and Harriet C Green 
 - New York :  D Van Nostrand Company, Inc.,    1947. 
 - 441p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linguistic
<br/><br/><label>Dewey Class. No.: </label>410  / POT/V