FARAG, S. (1987). WORLD SOURCES OF ENERGY. test, 2(A.S.A.T. CONFERENCE 21-23 April 1987 , CAIRO), 419-427. doi: 10.21608/asat.1987.26181
SAAD AWAD FARAG. "WORLD SOURCES OF ENERGY". test, 2, A.S.A.T. CONFERENCE 21-23 April 1987 , CAIRO, 1987, 419-427. doi: 10.21608/asat.1987.26181
FARAG, S. (1987). 'WORLD SOURCES OF ENERGY', test, 2(A.S.A.T. CONFERENCE 21-23 April 1987 , CAIRO), pp. 419-427. doi: 10.21608/asat.1987.26181
FARAG, S. WORLD SOURCES OF ENERGY. test, 1987; 2(A.S.A.T. CONFERENCE 21-23 April 1987 , CAIRO): 419-427. doi: 10.21608/asat.1987.26181