1. Aboul-Naga, A.M., Hassan, F., Abu El-Ela, M.B., 1988. Reproductive performance of local Egyptian sheep and goat breeds and crosses with imported temperate breeds “Philoetro”. In: Symposium on the Evaluation of Mediterranean Sheep and Goats. Santarem, Portugal.
2. Cabello, F.E., Andrade, M.H., Olmos, V.I., 1992. Production and reproduction in Anglo-Nubian goats under extensive management in a semi-arid climate. Memorias del III Congreso Nacional, AZTECA, Mexico D.F. Universidad Autonomy Metrapolitana, Iztapalapa.
3. Central Institution of Statistics, Egypt, 1997. Yearbook Statistics, Reference No. 71-97/12412. Ministry of Agriculture, Egypt.
4. Devendra, C., Burns, M., 1983. Goat production in the tropics. Commonwealth Agricultural Bureax. Farnham Royal, England.
5. Multiple range and multiple F-test;Duncan;Biometrics,1955