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1967
Frink, D.W. y Fannon, R.D., «The development of a water pump for underdeveloped countries to Agency for International Development». Battelle Memorial Institute, Columbus, OH, USA, p. 48 p. + 10 p. appendixes : 31 fig., 4 tab., 1967.
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Calvert, P., «Compost toilets : practical action, technology challenging poverty». The Schumacher Centre for Technology and Development, Rugby, UK, p. 5 p. : 1 fig.
Thailand, Ministry of Interior, Equipment Control Division -TH, «Hand pump improvement for Thailand rural area. Vol. II. Hand pump details drawing Department of Mineral Resources and Department of Public Works Types». Thailand, Ministry of Interior, Equipment Control Division, Bangkok, Thailand, p. 67 p. : techn.drwng.
Thailand, Ministry of Interior, Equipment Control Division -TH, «Hand pump improvement for Thailand rural area. Vol. III. Hand pump details drawing Accelerated Rural Development Office and Equipment Control Division Types». Thailand, Ministry of Interior, Equipment Control Division, Bangkok, Thailand, p. 81 p. : techn.drwng.
United Nations -New York, NY, US, Solar distillation as a means of meeting small-scale water demands. New York, NY, USA: United Nations, p. viii, 86 p.: 30 fig., 6 tab.
Brandberg, B., «Strategic sanitation and hygiene promotion for schools : sanitation technology options. Part 2. Construction drawings». SBI Consulting International, Mbabane, Swaziland, p. 25 p. : techn. drwngs.
Brandberg, B., «Strategic sanitation and hygiene promotion for schools : sanitation technology options. Part 1. Catalogue ». SBI Consulting International, Mbabane, Swaziland, p. 13 p. : techn.drwngs.
Bhatt, D.B., Tables for hydraulic design of circular drains, sewers and pipe-lines (in metric units). Ahmedabad, India: Dipavi Phenviron Enterprise, p. 86 p.: tab.
UNICEF -Chennai, IN, «Technical design hand book on sanitation and hygiene facilities at schools & anganwadies». UNICEF, Chennai, India, p. ca 60 p. : techn.drwng.
Yao, K.M., «Theoretical study of high-rate sedimentation : paper presented at the 42nd Annual Conference on Water pollution Control Federation, Dallas, Tex., October 5-10-1969», Journal WPCF, pp. p. 218-228: fig.

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