“Characteristics of Down Syndrome Children With Delayed Speech and Hearing Loss in Audiology Clinic, Dr. Soetomo Surabaya Hospital”. Indian Journal of Public Health Research & Development 11, no. 5 (May 18, 2020): 758–762. Accessed May 30, 2026. https://medicopublication.com/index.php/ijphrd/article/view/9429.