ANDERSON, J.D.M. Die toets van huishoudelike vastebrandstofverbruikende toestelle. Clean Air Journal, [S. l.], v. 1, n. 04, 1973. DOI: 10.17159/caj/1973/1/04.7220. Disponível em: https://cleanairjournal.org.za/article/view/7220. Acesso em: 18 may. 2024.