Virtual Naval Hospital
Military Medicine and Humanitarian Medicine Textbooks
http://www.vhn.org

The General Medical Officer Manual - 4th edition - NAVMEDPUB 5134, January 1, 2000
A Medical Reference for the Operational Medical Officer
http://www.brooksidepress.org/Products/OperationalMedicine/DATA/operatio...

Flight Surgeon's Manual - 3rd edition - 1991
http://www.operationalmedicine.org/TextbookFiles/USNavalFlightSurgeonsMa... (pdf - 8.2 MB - 1020 p)

Pararescue Medication and Procedure Handbook - Second Edition - 28 February, 2001
Editor : Robert C. Allen, DO, FACEP, Lt Col, USAF MC
Contributors : Lewis Neace, DO, Col, USAFR MC et alii.

http://www.ciomr.org/files/handbooks/PARARESCUE%20MEDICATION%20AND%20PRO...  (137 p - 3.56 MB - .doc) 

General medical reference books

eMedicine Emergency Medicine
http://www.emedicine.com/emerg/index.shtml

Disaster and Trauma eBook (2001)
pdf version - 30 MB - 1631 p - http://www.emedicine.com/specials/disaster.pdf

The Merck Manual of Diagnosis and Therapy (online edition)
http://www.merck.com/mmpe/index.html