. (1971). Sixth United Nations Regional Cartographic Conference for Asia and the Far East. (e26112). University College of Engineering, 19(0), e26112

. "Sixth United Nations Regional Cartographic Conference for Asia and the Far East" .e26112 , University College of Engineering, 19, 0, 1971, e26112.

. (1971). 'Sixth United Nations Regional Cartographic Conference for Asia and the Far East', University College of Engineering, 19(0), e26112.

, "Sixth United Nations Regional Cartographic Conference for Asia and the Far East," University College of Engineering, 19 0 (1971): e26112,

. Sixth United Nations Regional Cartographic Conference for Asia and the Far East. University College of Engineering. 1971;19(0):e26112 (In Persian).