Elyasi,H . (1993). Different levels of development and its role in technology. Sharif Journal of Civil Engineering, Vol. 9(4), 19-21.

Elyasi,H . "Different levels of development and its role in technology", Sharif Journal of Civil Engineering, Vol. 9, 4, 1993, 19-21.

Elyasi H. (1993). 'Different levels of development and its role in technology', Sharif Journal of Civil Engineering, Vol. 9(4), pp. 19-21.

H Elyasi, "Different levels of development and its role in technology," Sharif Journal of Civil Engineering, Vol. 9 4 (1993): 19-21,

Elyasi H. Different levels of development and its role in technology. Sharif Journal of Civil Engineering. 1993;Vol. 9(4):19-21 (In Persian).