Visible speech /
Potter, Ralph K
Visible speech / by Ralph K Potter, George A Kopp and Harriet C Green - New York : D Van Nostrand Company, Inc., 1947. - 441p. :
Linguistic
410 / POT/V
Visible speech / by Ralph K Potter, George A Kopp and Harriet C Green - New York : D Van Nostrand Company, Inc., 1947. - 441p. :
Linguistic
410 / POT/V