W. Wiederkehr,
« Policies of tariffs »,
Water supply : the review journal of the International Water Supply Association, p. p. IR 3.1 - 3.43: fig., tab., 1994.
E. Ministry o EG et IWRA -Urbana, IL, US,
« Satisfying future national and global water demands : proceedings : VIII IWRA world congress on water resources, Cairo, Egypt, November 21 - 25, 1994 ». International Water Resources Association, Urbana, IL, USA, p. 3 vol. (ca. 700, 700, 100 p.): fig., maps, tab., 1994.
G. D. J. Atkinson,
« Using water wisely : the public relations aspect »,
Water supply : the review journal of the International Water Supply Association, p. p. IR 4.1 - 4.30: fig., tab., 1994.