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http://www.torget.se/users/i/iluhya/our-tank.htm
http://www.unv.org/projects/sl/collect/swrc2.htm
http://www.yvw.com.au/corporate/savingwater/inthegarden/tanks.html
http://www.thisplace.com.au/building/mt_watertank.htm
http://www.uq.net.au/~zzdkeena/RainwaterTankSizing.htm
http://www.greenbuilder.com/sourcebook/Rainwater.html
http://www.omega-inc.com/water.htm
http://www.mycommunity.com.au/leichhardt/council/council/environ/rainwater.html
http://www.dhs.vic.gov.au/phd/9911054/
http://www.mallnet.de/english/regenwasser/rw_01_02.htm
http://www.riverbankdesign.com/html/horse_trailer_water_tanks.html
http://www.djc.com/special/enviro99/10057223.htm
http://www.rdrop.com/users/krishna/rainwatr.htm
http://www.bagelhole.org/drafts/Solar_Hot_Water_System.html
http://www.abc.net.au/science/planet/house/drink.htm
http://ag.arizona.edu/AZWATER/arroyo/071rain.html
http://ww2.kaneso.co.jp/data/new/0058/tanku200.htm
