Naeem I, Mubeen R, Shah SAH, Obaid S, Saqulain G. Maximum Phonation Time of School-Aged Children in Pakistan: A Normative Study : Maximum Phonation Time of School-Aged Children . PJHS-Lahore [Internet]. 2024 Feb. 29 [cited 2024 Nov. 21];5(02):13-8. Available from: https://mail.thejas.com.pk/index.php/pjhs/article/view/1290