1. U.S. Department of Health & Human Services, Toxicological Profile for Asbestos (Update), Draft for Public Comment, Public Health Service, Agency for Toxic Substances and Disease Registry, August 1999.
2. www.asbestos-institute.ca
3. www.chrysolite.com
4. Farley, M. L., MS, CT(ASCP), CMIAC, Fagan, M. F., M.D., Mabry, L. C., B.S., CT(ASCP), Kronenberg, R. S., M.D., The American Society of Clinical Pathologists Check Sample Program: Ferruginous Bodies in Pulmonary Cytology Specimens, Department Of Pathology and the Department of Medicine, University of Texas Health Center at Tyler, Cytopathology No. C89-8.
5. Klein, C. Hurlbut, Jr., Cornelius S. Manual of Mineralogy, 20th ed.; Wiley: New York, 1985.