1. Abate, Tom 1994 Overview of collapse in Bioscience 44: 516–19. (QH1 A. 15 but in Crerer in alphabetical order)
2. Adams R McC (1978) Strategies of maximisation, stability, and resilience in Mesopotamian society, settlement, and agriculture, Proceedings of the American Philosophical Society 122: 329–35
3. Adams R McC (1981) Heartland of Cities. University of Chicago Press, Chicago
4. Ali, Hassan Mohammed (1955) Land Reclamation and Settlement in Iraq Baghdad Printing Press, Iraq
5. Allen W (1965) The African husbandman, Edinburgh, Oliver and Boyd