Changes

* [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CEwQFjAA&url=ftp%3A%2F%2Fftp.wpro.who.int%2Fscratch%2FENH%2FHWTS%2FWHO%2520Final%2FParticipant%2520Manual%2FAppendices%2FParticipant%2520Manual_Appendix%25202_HWTS%2520Fact%2520Sheets_2011-09-05%2F3_Filtration%2FHWTS%2520Fact%2520Sheet_Straining_2011-06.doc&ei=dWDzT-eUBsqe2wWuzLj0Aw&usg=AFQjCNE2W01XfY7H6vgiYqrXUbX5fBvOsw&sig2=w5pcG7VmiOWuptaiv_3BnA Household Water Treatment and Safe Storage Fact Sheet: Straining.] CAWST. Calgary, Alberta, Canada.

* Brikke, François, and Bredero, Maarten. [http://www.washdoc.info/docsearch/title/117705 Linking technology choice with operation and maintenance in the context of community water supply and sanitation: A reference document for planners and project staff] or ([http://www.who.int/water_sanitation_health/hygiene/om/wsh9241562153/en/ alternative link]). World Health Organization and IRC Water and Sanitation Centre. Geneva, Switzerland 2003.

* [http://www.tulane.edu/~trmd700/nbaker.pdf Acceptance and use of communal filtration units in guinea worm eradication.] Tropical Medicine and International Health, January 2000.