Biblio

A. Arar, “Optimization of water use in arid areas”, in Satisfying future national and global water demands : proceedings : VIII IWRA world congress on water resources, Cairo, Egypt, November 21 - 25, 1994, 1994, pp. P. (T1-S2) 2.1 - 2.20: 3 tab.

P. W. English, “ The origin and spread of qanats in the old world”, Proceedings of the American Philosophical Society, pp. p. 170-181 : 4 fig., 1968.