http://www.mncs.k12.mn.us/frog/picts.html
http://www.pca.state.mn.us/hot/frogphotos.html
http://www.abcnews.com/sections/science/DailyNews/frogs980805.html
http://ftp.im.nbs.gov/amphib/state/mndeform.html
http://www.hartwick.edu/biology/def_frogs/def/deformed.html
http://www.nih.gov/news/pr/sept97/niehs-30.htm
http://www.kie.berkeley.edu/ned/data/E01-970821-018/E01-970821-018.html
http://www.kie.berkeley.edu/KIE/web/frogs/description.html
to be continued.......