1. Ruth Leger Sivard , World Military and Social Expenditures 1987-88 (Washington DC: World Priorities , 1987), pp. 28-31. Some notes on these wars and deaths are given on p. 52.
2. J. David Singer & Melvin Small, The Wages of War 1816-1965: A Statistical Handbook (NY: Wiley, 1972), pp. 27, 29.
3. Structural and armed violence in the 20th century: Magnitudes and trends∗
4. Violence, Peace, and Peace Research