R. Henderson y Abrahams, J.,
«Community water conservation program guide». Live and Learn Environmental Education, Alice Springs (AU), p. 58 p.; ill.; fig.; 1 box; 1 tab.; photographs.
«Community Water Supply & Sanitation Project : quarterly progress report». Sri Lanka, Ministry of Housing, Construction & Public Utilities, CWSSP, Battaramulla, Sri Lanka.
P. Calvert,
«Compost toilets : practical action, technology challenging poverty». The Schumacher Centre for Technology and Development, Rugby, UK, p. 5 p. : 1 fig.
Empresa de Acueducto y Alcantarillado de Cali S.A. ESP -Cali, CO, ACUACALI, Cali, C. O. Universida, y Cali, C. O. C. I. N. A. R. A. -,
«Conozcamos y cuidemos nuestro alcantarillado». Empresa de Acueducto y Alcantarillado de Cali S.A. ESP – ACUACALI, Cali, Colombia, p. 22 p.