Mubila, L. F.; Sailen, A. M.; Mdimi, L. A.; Barnabas, E.; Mwakapuja, R. S.; Malago, J. J. Effects of Vitamin A Supplementation in Local Free Range Chickens Vaccinated With Newcastle Disease Vaccine in Wami Dakawa, Morogoro, Tanzania. Tanz Vet J 2020, 36, 50-53.