AMADOU, Jabiru Muhammadou. Hausa Traders in North West Cameroon from the 19TH to the 20TH Century a Historical Investigation. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 33, n. 1, p. 49–68, 2017. Disponível em: https://asrjetsjournal.org/American_Scientific_Journal/article/view/3002. Acesso em: 20 sep. 2025.