Arsyad, J., Arsyad, F., Lubis, C. and Siregar, H. (2019) “Children’s Immunization Status and Family Size of Doctor’S FaMilies in Dr. Pirngadi Haspital Medan”, Paediatrica Indonesiana, 25(5-6), pp. 93-9. doi: 10.14238/pi25.5-6.1985.93-9.