War Surgery - manual by Dr. Edmond Delorme - 1915
http://www.vlib.us/medical/delorme/delorme.htm

A manual of military surgery, by S.D. Gross, MD, 1861
http://jdc.jefferson.edu/milsurgusa/

A manual of military surgery, [Confederate States Army], 1863
http://jdc.jefferson.edu/milsurgcsa/

Combat Casualty Care and Surgical Progress
Basil A. Pruitt, Jr., MD, FACS - Annals of Surgery • Volume 243, Number 6, June 2006
http://surgery.uthscsa.edu/faculty/pubs/2006-pres-pruitt.pdf

Tracheostomy and tracheal intubation in military history
http://www.jrsm.org/cgi/reprint/93/7/380

US Army - Military Medical History
http://www.cs.amedd.army.mil/history/ele-milmed.html

Why is the Colonel Called "Kernal"?
The Origin of the Ranks and Rank Insignia Now Used by the United States Armed Forces
http://www.history.navy.mil/trivia/trivia04.htm