Pettala, Ramakrishna <br/><br/>
Assistive technology and hearing impairment / 
Ramakrishna Pettala 
 - New Delhi :  Discovery Publishing House Pvt. Ltd.,  2020. 
 - 238 pages 
<br/><br/><label>ISBN: </label>9388854217 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hearing aids<br/>Deafness--Treatment<br/>Communication devices for people with disabilities
<br/><br/><label>Dewey Class. No.: </label>617.89 PET