MITCHELL, Duncan. Excalfactoria and a bird and word book to keep you warm. South African Journal of Science, [S. l.], v. 110, n. 9/10, p. 12, 2014. DOI: 10.1590/sajs.2014/a0077. Disponível em: https://sajs.co.za/article/view/3963. Acesso em: 7 may. 2024.