00481nam a22001577a 4500 19308 19308 9388854217 617.89 PET Pettala, Ramakrishna Assistive technology and hearing impairment / Ramakrishna Pettala New Delhi : Discovery Publishing House Pvt. Ltd., 2020. 238 pages Hearing aids Deafness--Treatment Communication devices for people with disabilities RFT 0 0 0 0 R-59/2 AIISH AIISH 2023-02-01 0 617.89 PET 23243 2023-02-01 00:00:00 2023-02-01 RFT 0 0 0 0 94/4 AIISH AIISH 2023-02-01 0 617.89 PET;1 23244 2023-02-01 00:00:00 2023-02-01 STS 0 0 0 0 94/4 AIISH AIISH 2023-02-01 0 617.89 PET;2 23245 2023-02-01 00:00:00 2023-02-01 STS