Maeda-Machang’u , A.D., and J.S.A. Materu. 1990. “A Survey of Fowlpox Prevalence in Morogoro Township and Adjacent Farms Between 1977 and 1982”. Tanzania Veterinary Journal 10 (2):70-74. https://tvj.sua.ac.tz/vet2/index.php/TVJ/article/view/359.