Abies bracteata - Physical characteristics, range, ethnobotany, and extensive remarks from Thomas Coulter, who first discovered this species. Includes images. - http://www.conifers.org/pi/ab/bracteata.htm
Abies bracteata (Bristlecone Fir) - Describes physical characteristics and provides photos of mature tree, twig, needles, and bark. - http://www.cnr.vt.edu/dendro/dendrology/Syllabus2/abracteata.htm