281. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1785780/pdf/brmedj02219-0067.pdf

282. http://www.howorthgroup.com/about-us/history

283. http://english.siuc.edu/Resources/HaroldGilles.pdf

284 http://www.healthandhealingny.org/tradition_healing/native-history.html

285  Notable Names in Anaesthesia Ed. J.R Maltby p43

286  Notable Names in Anaesthesia Ed. J.R Maltby p55

287 http://www.stx.ox.ac.uk/about/publications/record/20/obituaries#epstein

288 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2311759/pdf/annrcse00207-0059.pdf

289 http://www.redcross.org/museum/history/claraBarton.asp

290 http://volweb.utk.edu/Schools/bedford/harrisms/brittany.htm