Introduction of Engine Oil to Villagers. Dharmakayana, [S. l.], v. 1, n. 2, p. 52–56, 2024. DOI: 10.33369/dk.v1i2.38916. Disponível em: https://ejournal.unib.ac.id/dharmakayana/article/view/38916. Acesso em: 1 jul. 2025.