MLA bizz

Mathews, Daniel. Rocky Mountain Natural History. Portland Oregon: Raven Editons, 2003.
“Pica hudsonia” Cornell lab of Ornithology. 2003. Cornell University. 5/20/08 (http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Black-billed_Magpie.html)
Bna.birds.cornell.edu. 2005. Cornell University. 5/22/08. [http://bna.birds.cornell.edu/bna/species/389/articles/introduction]
Pica hudsonia. 5/22/08 http://dwrcdc.nr.utah.gov/rsgis2/images/Photos/picapica.jpg
Quaking Aspen 5/26/08 http://www.allposters.com/-sp/Autumn-foliage-and-tree-trunks-of-quaking-aspen-trees-in-the-Crested-Butte-area-of-Colorado-Posters_i1016400_.htm