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Filters: Author is Claasen, F.  [Clear All Filters]
2012
D. Bouman, Holtslag, H., y Claasen, F., «WASH solutions for schools : a hand-out for the ARC Water schools Program». p. 39 p.; ill.; 8 tab.; 3 fig.; 5 boxes, 2012.
1987
L. Childers y Claasen, F., «UNICEF's upward-flow water filter», Waterlines, an international journal of water, sanitation and waste, pp. p. 29-31: ill., 1987.
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