Usafi wa mazingira : Tofauti kati ya masahihisho

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Rescuing 6 sources and tagging 0 as dead.) #IABot (v2.0.8
Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8
Mstari 109:
*[http://web.worldbank.org/WBSITE/EXTERNAL/TOPICS/EXTWAT/EXTTOPSANHYG/0,,contentMDK:21147365~menuPK:3748896~pagePK:64168427~piPK:64168435~theSitePK:1923181,00.html Usafi wa mazingira, Usafi na maji machafu Guide Rasilimali (World Bank)]
*[http://www.eawag.ch/organisation/abteilungen/sandec/publikationen/publications_sesp/downloads_sesp/compendium_low.pdf Tilley et al:. Elezo huru wa Systems Usafi wa Mazingira na Teknolojia] , Ugavi wa Maji na Usafi wa Mazingira Baraza shirikishi / Uswisi Shirikisho Taasisi ya Sayansi na Teknolojia majini (EAWAG), 2008
*Asia ya Kati Review Afya (CAHR). [http://www.cahr.info/index_files/page0015.htm Usafi maskini Sababu kifo miongoni mwa watoto chini ya miaka mitano katika Afghanistan] {{Wayback|url=http://www.cahr.info/index_files/page0015.htm |date=20101007000128 }}
*[http://hdr.undp.org/hdr2006/pdfs/report/HDR_2006_Chapter_3.pdf Wa 2006 Taarifa ya UNDP ya Maendeleo ya Binadamu: Zaidi ya uhaba: Power, umaskini na mgogoro wa maji - Chapter 3: The nakisi kubwa katika usafi wa mazingira] {{Wayback|url=http://hdr.undp.org/hdr2006/pdfs/report/HDR_2006_Chapter_3.pdf |date=20070927045525 }} accessed tarehe 22 Agosti 2007
*[http://web.worldbank.org/WBSITE/EXTERNAL/TOPICS/EXTWAT/0,,menuPK:337308~pagePK:149018~piPK:149093~theSitePK:337302,00.html Maji na Usafi wa Mazingira, Benki ya Dunia] accessed tarehe 22 Agosti 2007