Heffner, R. M. S. (Roe-Merrill Secrist), 1892-  Heffner, R. M. S. (Roe-Merrill Secrist), 1892- <br/><br/>
General phonetics :  by R.M.S. Heffner ; with a foreword by W.F. Twaddell. 

 - Madison :  University of Wisconsin Press,  1969, c1950. 
<br/><br/> First published 1950. 
<br/><br/>Includes bibliographical references and index.