GIFFORD, Paul. The Vanguard of Colonialism: Missionaries and the Frontier in Southern Africa in the Nineteenth Century. Constellations, [S. l.], v. 3, n. 2, 2012. DOI: 10.29173/cons17204. Disponível em: https://journals.library.ualberta.ca/constellations/index.php/constellations/article/view/17204. Acesso em: 19 apr. 2024.