@article {39702,
	title = {Canadian wetlands: environmental gradients and classification},
	volume = {118},
	year = {1995},
	pages = {131-137},
	publisher = {Plant Ecology},
	url = {http://www.springerlink.com/content/ln400886707p1762/},
	author = {Zoltai, S. C. and Vitt, D. H.}
}
