N. L. I. W. A. C. O. - Rotterdam, Social Planning, Analysis and Administration Consultants -Cairo, EG, SPAAC, en 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.
S. Cairncross,
“Developing evaluation guidelines for studying hygiene practices”,
Waterlines, an international journal of water, sanitation and waste, pp. p. 2-5: photogr., 1991.
D. D. Mara, Pinfold, J., en Hubley, J.,
“A hygiene intervention study in rural north-east Thailand”,
Waterlines, an international journal of water, sanitation and waste, pp. p. 9-12: 4 fig., ill., photogr., 1991.
S. Bhattacharya,
“Project nutrition, health education & environmental sanitation : an impact study”. National Council of Educational Research and Training, New Delhi, India, p. xxii, 262 p.: tab., 1991.
R. E. Black, Yeager, B. A. C., Lanata, C. F., Lazo, F., en Verastegui, H.,
“Transmission factors and socioeconomic status as determinants of diarrhoeal incidence in Lima, Peru”,
Journal of diarrhoeal diseases research, pp. p. 186-193: 5 tab., 1991.
R. E. Black, Adair, L. S., Akin, J. S., Guilkey, D. K., Popkin, B. M., Flieger, W., en Briscoe, J.,
“Underlying and proximate determinants of child health : the Cebu longitudinal health and nutrition study”,
American journal of epidemiology, pp. P. 185-201: fig., tab., 1991.