F. I. Soil and W. Helsinki, Viet Nam Consultant on Water Supply, Sanitation and Environment -VN, VIWASE, VN, V. Nam. Minis, and Helsinki, F. I. F. I. N. N. I. D. A. -,
“National urban wastewater collection and sanitation strategy study : final report”. Soil and Water Ltd, Helsinki, Finland, p. ca. 450 p. : fig., photogr., tab., 1996.
