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- Population 17
- Food supply 5
- Barley 2
- Croplands 2
- Agriculture 1
- Birth control 1
- Brown, Lester R. (Lester Russell), 1934- 1
- Bureaucracy 1
- Climate 1
- Deserts 1
- Food 1
- Groundwater 1
- Hydrology 1
- Irrigation 1
- Labor 1
- Migration 1
- Rain and rainfall 1
- Reservoirs 1
- Soils 1
- Springs 1