Siregar, H.H. and Suranto 2025. Ethnoscience of Educative Values of Margondang Custom of South Tapanuli Community in Gunung Malintang Village, Barumun Tengah Subdistrict, Padang Lawas Regency. Jurnal Penelitian Pendidikan IPA. 11, 1 (Feb. 2025), 986–992. DOI:https://doi.org/10.29303/jppipa.v11i1.9828.