by Atef, M., Youssef, S.A.H., El-Eanna, H.A., El-Maaz, A.A.
Published in British poultry science (01.08.2002)

by Atef, M. (Cairo University Giza (Egypt). Faculty of Veterinary Medicine. Department of Pharmacology), Youssef, S.A.H, Atta, A.H, El-Maaz, A.A
Published in DTW. Deutsche tierarztliche Wochenschrift (01.12.1991)

by Atef, M, Youssef, S A, Atta, A H, el-Maaz, A A
Published in British veterinary journal (01.05.1991)