Purba, Djaman, Nasril Nazir, M. Purba, Rehmamana Sembiring, Noersida Raid, S. M. Manoeroeng, and Helena Siregar. 1982. “The Peripheral Blood Standard Values in Newborns in Dr. Pirngadi Hospital Medan”. Paediatrica Indonesiana 22 (5-6), 77-82. https://doi.org/10.14238/pi22.5-6.1982.77-82.