MAHDANG, Putri Ayuningtias; MAKSUM, Tri Septian. Analysis of Ergonomic Risk Levels in Manual Handling Activities Using the National Institute for Occupational Safety and Health (NIOSH) Lifting Equation Method with Upper Back Pain Complaints. Buletin Penelitian Kesehatan, [S. l.], v. 53, n. 1, p. 12–20, 2025. DOI: 10.33860/bpk.v53i1.3959. Disponível em: https://ojs.polkespalupress.id/index.php/bpk/article/view/3959. Acesso em: 30 oct. 2025.