Khairy، A. H. A.، و Rifky Faris. (1988). study of pulmonary functions among electrical Arc welders (رسالة ماجستير غير منشورة). Ain Shams university/faculty of medicin/industrial medicin department ،
MLA اقتباسKhairy، Abdel Hamid Ahmed ، و Rifky Faris. "Study of Pulmonary Functions Among Electrical Arc Welders " رسالة ماجستير. Ain Shams university/faculty of medicin/industrial medicin department ، 1988.