Reference and Bibliography
http://en.wikipedia.org/wiki/River
http://onlinelibrary.wiley.com/doi/10.1029/GM055p0375/summary;jsessionid=306AF70FEA9220BA789EFE0DCCA82E95.f01t04?primaryCompoundsResultsPerPage=250
http://blog.cifor.org/congo/
http://www.mbgnet.net/fresh/rivers/how.htm
http://www.onegeology.org/extra/kids/earthprocesses/rivers.html
http://www.nerrs.noaa.gov/doc/siteprofile/acebasin/html/envicond/geomorph/gmmorph.htm
www.thefreedictionary.com
http://www.youtube.com/watch
http://onlinelibrary.wiley.com/doi/10.1029/GM055p0375/summary;jsessionid=306AF70FEA9220BA789EFE0DCCA82E95.f01t04?primaryCompoundsResultsPerPage=250
http://blog.cifor.org/congo/
http://www.mbgnet.net/fresh/rivers/how.htm
http://www.onegeology.org/extra/kids/earthprocesses/rivers.html
http://www.nerrs.noaa.gov/doc/siteprofile/acebasin/html/envicond/geomorph/gmmorph.htm
www.thefreedictionary.com
http://www.youtube.com/watch