Bibliography
- http://water.epa.gov/type/watersheds/whatis.cfm
- http://www.enchantedlearning.com/usa/rivers/
- http://www.nature.org/ourinitiatives/habitats/riverslakes/placesweprotect/mississippi-river.xml
- http://www.txpeer.org/toxictour/laredo.html
- http://www.waterinfo.org/resources/water-facts
- http://water.usgs.gov/edu/qa-home-percapita.html
- http://motherboard.vice.com/blog/every-year-beijing-uses-400-billion-more-gallons-of-water-than-its-got
- http://www.epa.gov/watersense/our_water/water_use_today.html
- http://wateruseitwisely.com/100-ways-to-conserve/
- http://www.conservewater.utah.gov/WhyConserve/