Schachtel, Irving I.  <br/><br/>
Conserving our children's hearing / 
Irving I. Schachtel 
 - Elmsford, N.Y. :   Sonotone Corp.,   ©1949-1951 
 - 66 p.: 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hearing disorders in children
<br/><br/><label>Dewey Class. No.: </label>618.920 978 SCH