Sidauruk, J. L.; Tarigan, L. . Radiography Of The Paranasal Sinus With Maxial Sinusitis In North Sumatra-Medan University Hospital. Int. J. Multidiscip. Appl. Bus. Edu. Res. 2022, 3 (8), 1583-1588. https://doi.org/10.11594/ijmaber.03.08.21.