Referaat "Suur Järvistu"
epa.gov/greatlakes/great-lakes-facts-and-figures
2) Zimmermann, K. A. [WWW] http://www.livescience.com/29312-great-lakes.html
3) http://www.cglgsa.org/images/greatlakesmap.gif
4) Beeton, A. M. “Great Lakes”. Encyclopedia Britannica. [WWW].
https://www.britannica.com/place/Great-Lakes (2016)
5) Williamson J. „The inland seas of North America and the natural and industrial
products of Canada“ (1854)
6) [WWW] http://geo.msu.edu/extra/geogmich/watershed.html
7) [WWW] https://www.epa.gov/greatlakes/physical-features-great-lakes
8) Wilby, R. L. "Adaptation: Wells of wisdom" (2011)
9) National Geographic/BBC. „How the Earth was made. Great Lakes“ (2008)
10) [WWW] http://geo.msu.edu/extra/geogmich/drumlins.html
11) [WWW]
http://www.maritimehistoryofthegreatlakes.ca/GreatLakes/Documents/HGL/figur
es.asp?ID=f156
12) United States Environmental Protection Agency, Government of Canada. The
Great Lakes