Citations

"aspen." Encyclopædia Britannica;2008. Encyclopædia Britannica Online 28 May 2008 <http://www.britannica.com/eb/article-9009894>.



"Populus tremuloides." Wikipedia, The Free Encyclopedia. 17 May 2008, 18:44 UTC. Wikimedia Foundation, Inc. 28 May 2008 <http://en.wikipedia.org/w/index.php?title=Populus_tremuloides&oldid=213088619>.



Photos:
Moose-1. 5-28-08 http://homepage.univie.ac.at/horst.prillinger/blog/p3/moose-1.jpg

Aspen Tree. 5-28-08. http://www.carto.net/neumann/mountaineering/mono_lake_sierra_nevada_2003_10/075_aspen_tree.jpg