Hassan, A., Mahdi, M., & Najibullah, A. (2019). Cephalometry to determine the head index of children younger than 6 years in kindergartens at the Ministry of higher education in Kabul, Afghanistan. International Journal of Research in Medical Sciences, 7(4), 1336–1340. https://doi.org/10.18203/2320-6012.ijrms20191349