"IAMA ANIMAL HAIR IMAGES." IAMAWEB.com. Tri-Tech, Inc., n.d. Web. 17 Nov. 2014. http://www.iamaweb.com/Animal_Hair/Beaver/Beaver-hair.html.
Deedrick, Douglas W. "Microscopy of Hair Part II: A Practical Guide and Manual for Animal Hairs." FBI.gov. Federal Bureau of Investigation, July 2004. Web. http%3A%2F%2Fwww.fbi.gov%2Fabout-us%2Flab%2Fforensic-science-communications%2Ffsc%2Fjuly2004%2Fresearch%2F2004_03_research02.htm.