1. Guns, germs and steel;Diamond,1999
2. Veterinary medicine: an illustrated history;Dunlop,1996
3. History of the great war based on official documents;Blenkinsop,1925
4. The control of infections in hospitals: 1750 to 1950;LaForce,1987
5. The etiology, the concept and the prophylaxis of childbed fever;Semmelweiss,1861