Lubis, Yahya G., T. Razif, Manihar D. Marbun, and Bistok Saing. 2018. “Hydrocephallus in the Department of Child Health, School of Medicine University of North Sumatera Dr. Pirngadi Hospital, Medan”. Paediatrica Indonesiana 33 (1-2):32-6. https://doi.org/10.14238/pi33.1-2.1993.32-6.