WHO -Geneva, CH, World Health Organization and Harare, Z. W. Blair Rese,
“Appropriate sanitation for very low income communities. Vol. I : Background reader for a workshop in Harare, Zimbabwe, November 1991”. World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. 36 p.: drawing, 1992.
WHO -Geneva, CH, World Health Organization, Morgan, P., and Harare, Z. W. Blair Rese,
“Appropriate sanitation for very low income communities. Volume 1. Background reader for a workshop in Harare, Zimbabwe, November 1991”. World Health Organization (WHO), Geneva, Switzerland, p. 36 p. : ill., tab., 1992.
