1. Mabrouk M.M.S. , 1970. Studies on the reproductive performance of sheep under coastal desert conditions. M. Sc. Thesis, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt.
2. Estimates of genetic and phenotypic parameters of some weight and fleece traits in a coarse-wool breed of sheep
3. El-Shahat A.A. , 1970. Study of some factors affecting milk production in native, imported and crossbred sheep under coastal desert conditions. M.Sc. Thesis, Faculty of Agriculture, Ain Shams University, Cairo, Egypt.
4. Fleece properties of indigenous, exotic and crossbred sheep in a southern zone of the Mediterranean area;Ashmawi;Egypt. J. Anim. Prod.,1984
5. Optimum ewe size in desert Barki sheep