Estat tròfic (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Estat tròfic" in Catalan language version.

refsWebsite

Global rank Catalan rank

882^nd place

660^th place

epa.gov

United States Environmental Protection Agency (2007) Carlson'sTrophic State Index. Aquatic Biodiversity. http://www.epa.gov/bioindicators/aquatic/carlson.html accessed 17 February, 2008.