K. D. Hapugoda,
“Action research study on rain water harvesting”, vol. 2. Sri Lanka, Ministry of Housing, Construction & Public Utilities, CWSSP, Battaramulla, Sri Lanka, p. 120 p.: fig., tab., ill., 1995.
C. Dean and Horan, N.,
Applications of UASB technology in Mauritius, vol. no. 7. Leeds, UK: University of Leeds, Department of Civil Engineering, 1995, p. xi, 91 p. : fig., tab.