Napitupulu, David, Jagentar Pane, and Lindawati Simorangkir. “Knowledge about Worms in Primary 1 School”. Proceedings of the International Conference on Nursing and Health Sciences 5, no. 1 (March 1, 2024): 153-156. Accessed June 21, 2026. http://jurnal.globalhealthsciencegroup.com/index.php/PICNHS/article/view/2860.