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Rujukan WikiPedia: Lembangan_saliran http://www.ewatercrc.com.au/ http://www.abc.net.au/science/catchmentdetox/facts... http://www.toolkit.net.au/ http://www.cycleau.com/index.asp http://web.mit.edu/star/hydro http://techalive.mtu.edu/meec/module01/whatiswater... http://spectre.nmsu.edu/watertaskforce/aboutus.las... http://www.wr.udel.edu/cb/whatwhycare.html http://www.uwsp.edu/geo/faculty/ritter/glossary/a_... http://cfpub.epa.gov/surf/locate/index.cfm
