Sidauruk, Juliana Lasniar, and Liberti Tarigan. 2022. “Radiography Of The Paranasal Sinus With Maxial Sinusitis In North Sumatra-Medan University Hospital”. International Journal of Multidisciplinary: Applied Business and Education Research 3 (8), 1583-88. https://doi.org/10.11594/ijmaber.03.08.21.