I. van Hooff,
«Hacia una mejor programacion : manual sobre saneamiento e higiene en la escuela», vol. num. 5. UNICEF Water, Environment and Sanitation Section, New York, NY, USA, p. vi, 62 p. : 55 boxes, 2 ill., 1998.
A. H. Khan,
Orangi Pilot Project : reminiscences and reflections, Expanded ed. Karachi, Pakistan: Oxford University Press, 1998, p. xiv, 175 p. : 35 photogr.
G. Whitby,
«Primary community school construction»,
Appropriate technology, pp. p. 30-32 : 1 box, 1998.
I. N. Socio Econ Trivandrum,
«SEU Foundation : progress report : October 1997 to March 1998». Socio-Economic Unit Foundation, Trivandrum, India, p. iii, 73 p. + annexes (23 p.) : fig., tab., 1998.
UNICEF -New York, NY, US. Water and Environmental Sanitation Section y IRC International Water and Sanitation Centre, The Hague, NL,
«Towards better programming : a manual on school sanitation and hygiene», vol. no. 5. UNICEF, New York, NY, USA, p. ix, 61 p. : 55 boxes, 1998.
I. van Hooff,
«Vers une meilleure programmation : un manuel sur l'hygiène et l'assainissement en milieu scolaire», vol. no. 5. UNICEF Water, Environment and Sanitation Section, New York, NY, USA, p. vi, 65 p. : 55 boxes, 2 ill., 1998.