Harvard University -Cambridge, MA, US,
«Childhood diarrhea in sub-Saharan Africa», vol. vol. 2. no. 1. Harvard Institute for International Development, Cambridge, MA, USA, p. 32 p. : 4 photogr., 4 tab., 1998.
A. C. Gorter,
Childhood diarrhoea and its prevention in Nicaragua. Maastricht, The Netherlands: University of Maastricht, 1998, p. 212 p. : tab., fig.
V. Curtis,
The dangers of dirt : household hygiene and health. Wageningen, The Netherlands: Agricultural University Wageningen, 1998, p. xiii, 175 p. : fig., ill., tab.
S. R. A. Huttly, Fukumoto, M., del Aguila, R., Kendall, C., Yeager, B. A. C., y Lanata, C. F.,
«Feces, flies, and fetor : findings from a Peruvuain shantytown»,
Pan American journal of public health = Revista Panamericana de salud publica, pp. p. 75-79 : 3 tab., 1998.
J. Bijlmer y Stegeman, M.,
Habitat : wonen en leven in de stad, vol. no. 9. The Hague, The Netherlands: Netherlands, Ministry of Foreign Affairs, DGIS, Information Department, 1998, p. 238 p. : map, photogr.