AN IN SITU VOLCANIC GASEOUS EMISSIONS CONCENTRATION MEASUREMENT SYSTEM: A CASE STUDY FOR WELIRANG VOLCANO, MALANG, INDONESIA. GEOMATE Journal, [S. l.], v. 22, n. 93, p. 44–51, 2022. Disponível em: https://geomatejournal.com/geomate/article/view/2506. Acesso em: 8 may. 2026.