1. Aini, I. (1990). Indigenous chicken production in South-east Asia.World’s Poultry Science Journal,46, 51–57.
2. Al-Soudi, K. A. &Al-Jebouri, M. A. J. (1979). Productive potential in subtropic climate of native Iraqi chicken compared to White Leghorn, New Hampshire and their cross.World’s Poultry Science Journal,35, 227–235.
3. Berdugo, J. G. & Franco, C. (1991). Ganadería de traspatio en el estado de Yucatán. In:Memoria de la Segunda Reunión sobre Producción Animal Tropical. (Eds R. Godoy, J. C. Segura and A. Arellano). Mérida, Yucatán, México, pp 114–120.
4. Calnek, B. W. &Witter, R. L. (1978). Marek’s Disease. In:Diseases of Poultry. 7th ed. (Eds M. S. Hofstadet al.). Iowa State Press, Ames, USA, pp 396–398.
5. Centers for Disease Control and Prevention and World Health Organization (1994).EpiInfo, Version 6.02, Centers for Disease Control, Atlanta, Georgia, USA, 581 pp.