HAIR AND FIBERS
http://www.fbi.gov/hq/lab/handbook/examhair.htm
http://www.fbi.gov/hq/lab/fsc/backissu/july2000/deedric1.htm

Hair and Fibers

"Whether the hair fell out..."

"Foreign materials such as dirt..."

"There are four types of..."

"the presence of additives and..."

"Most comparisons of fibers are..."