Biblio

E. W. Kindel, “A hydraulic ram for village use”. Volunteers in Technical Assistance, Mt. Rainier, MD, USA, p. 11 p. : 5 fig., 1975.

N. L. W. O. T. - Enschede, “The salawepump : construction manual”. TOOL, Eindhoven, The Netherlands, p. 6 p. : fig., 1975.

J. L. Cleasby, “Wastewater filtration : design considerations”, vol. EPA 625/4-74-007a. US Environmental Protection Agency (EPA), Washington, DC, USA, p. 48. p. : fig. tab., 1974.

M. Blaho, “U.S.T. type well pump”. Kumasi University of Science and Technology, Kumasi, Ghana, p. 9 p. : 4 fig., 1972.

R. P. Lalor, “Design of non-mechanical chlorinator for small water supplies”, vol. no. 1. Duke University, Department of Forestry and Environmental Studies, Durham, NC, USA, p. 9 p. : 5 fig., 1971.

G. Tschannerl, “Proceedings of the conference on rural water supply, 5-8 April 1971, University of Dar es Salaam”, vol. no. 20. University of Dar es Salaam, Bureau of Resource Assesssment and Land Use Planning, Dar es Salaam, Tanzania, p. 260'p. : fig., tab., 1971.

National Academy of Sciences -Washington, DC, US, “Thermoplastic piping for potable water distribution systems”, vol. no. 61. National Academy of Sciences (USA), Washington, DC, USA, p. viii, 52 p. : 3 fig., 1971.