Youssef, S. A., Saad, F., Sefein, S, Abdel-Salam, H., M. Taha, and M.: Refai,
" Fungus precipitins in workers of Quose sugar factory. ",
Egypt. J.Chest Dis.&Tub. , vol. 23, , pp. 49-60 , 1980.
Youssef, S. A., El-Sarangawy, A., Youssef, S. A., Hassan, Taha, M., H. Hammad, and M.: Refai,
" Preliminary study of mycoflora in sputum of poultry workers and screening of their sera for antifungal precipitins. ",
Egypt. J. Chest Dis.&Tub., vol. 23, , pp. 61-70, 1980.
Youssef, S. A., Youssef, S. A., Abogamra, M., H. Hammad, and M. Refai,
" : Mycological and serological studies on grain workers in mill factories in Cairo. ",
Egypt. J. Chest Dis.&Tub., vol. 23, , pp. 33-48 , 1980.
Youssef, S. A., Youssef, S. A., Refai, M., M. Taha, and E.: Barakat,
" Fungi in the air of different departments of Ain Shams Hospital. ",
Ain Shams Med. J., vol. 31, , pp. 245-255 , 1980.
Youssef, S. A., Saad, F., Sefein, S, Abdel-Salam, H., M. Taha, and M. Refai,
" Fungus precipitins in workers of Quose sugar factory. ",
Egypt. J.Chest Dis.&Tub. , vol. 23, , pp. 49-60 , 1980.
Youssef, S. A., Refai, M., Youssef, S. A., Taha, M., Hassan, M. Awad, and T. Safwat,
": Incidence of yeasts in the sputum of patients with bronchopulmonary diseases in Egypt. ",
Egypt. J. Chest Dis.&Tub. , vol. 23, , pp. 27-32 , 1980.
Refai, M., El-Gibali, S., M. Saber, and S.: Ibrahim,
"Studies on the immune response of guinea pigs to living and dead Brucella abortus smooth (Strain 19) and rough (45/20) antigens. ",
Assiut Vet. J., vol. 8, , pp. 101-106 , 1980.