http://en.wikipedia.org/wiki/Tuberculosis by Wikipedia, Last updated October 6, 2006, as viewed on March 7, 2007

http://familydoctor.org/120.xml by the American Academy of Family Physicians, last updated 7/ 2005, as viewed on March 7, 2007

http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&b=35778, by the American Lung Association, Last updated 2007, as viewed on March 7, 2007

www.nlm.nih.gov/medlineplus/ency/article/000077.htm by ADAM editorial, Last updated 9/8/2005, as viewed on March 7, 2007

http://www.umdnj.edu/globaltb/tbhistory.htm by the New Jersey Medical School, last updated on February 27, 2007, as viewed on March 7, 2007

http://www.phac-aspc.gc.ca/publicat/tbfs-fitb/tb-outsidelungs_e.html by the Public Health Agency of Canada, last updated 6/22/2004, as viewed on March 7, 2007