Corynebacterium diphtheriae
By Dr. Kenneth Todar, University of Wisconsin-Madison.
http://www.bact.wisc.edu/Bact330/lecturediphth
Diphtheria Fact Sheet
By New York State Department of Health Communicable Disease Fact Sheet.
http://www.health.state.ny.us/nysdoh/consumer/diptheri.htm
Diphtheria Fact Sheet
By the World Health Organization.
http://www.who.int/mediacentre/factsheets/fs089/en/
Diphtheria, Tetanus, and Pertussis
By Travelers' Health, the National Center for Infectious Diseases.
http://www.cdc.gov/travel/diseases/dtp.htm
