N. L. I. W. A. C. O. - Rotterdam, Social Planning, Analysis and Administration Consultants -Cairo, EG, SPAAC, y Cairo, E. G. U. N. I. C. E. F. -,
«Assessment of the impact of a combined water and sanitation programme in Upper Egypt : proximate impact analysis : environmental sanitation survey». IWACO, Rotterdam, The Netherlands, p. iii, 84 p. + annexes (ca. 40 p): fig., tab., 1991.