N. Herath, “Optimisation of local resources for hand-dug wells”, in Towards the millennium development goals - actions for water and environmental sanitation : proceedings of the 29th WEDC conference, Abuja, Nigeria, 2003, Loughborough, UK, 2003, pp. p. 196-199 : 4 photogr., 2 tabs.
2001
N. Herath, Manual 2, Hand-dug Wells, Revised edition. Nugegoda, Sri Lanka: NORAD, Norwegian Agency for Development Cooperation, 2001, p. 71 p. + 9 p. annexes : fig., photogr.