COX, M. H. The Ricardo Steam Engine - (a New Power Unit for Rural Development Work in India). Indian Forester, [S. l.], v. 79, n. 6, p. 331–338, 1953. DOI: 10.36808/if/1953/v79i6/23542. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/23542. Acesso em: 21 aug. 2025.