Chumakov, F I <br/><br/>
[On the history of mechanical hearing aids].  [electronic resource] 

 -  Vestnik otorinolaringologii  1997 
 - 56-8 p.  digital 
<br/><br/> Publication Type: Historical Article; Journal Article 
<br/><br/><label>ISSN: </label>0042-4668 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Equipment Design<br/>Hearing Aids--history<br/>History, 16th Century<br/>History, 17th Century<br/>History, 18th Century<br/>History, 19th Century<br/>History, 20th Century