http://www.defenders.org/wetlands/basic-facts
http://www.environment.gov.au/wetlands
http://www.parksaustralia.gov.au/kakadu/people/culture.html
https://en.wikipedia.org/wiki/Kakadu_National_Park
http://www.hydrol-earth-syst-sci.net/7/358/2003/hess-7-358-2003.pdf
http://www.worldwildlife.org/habitats/wetlands
http://www.tigers.org.za/sumatran-tiger.html
http://www.environment.gov.au/wetlands
http://www.parksaustralia.gov.au/kakadu/people/culture.html
https://en.wikipedia.org/wiki/Kakadu_National_Park
http://www.hydrol-earth-syst-sci.net/7/358/2003/hess-7-358-2003.pdf
http://www.worldwildlife.org/habitats/wetlands
http://www.tigers.org.za/sumatran-tiger.html