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Topic
- Population 21
- Food supply 6
- Barley 2
- Charts, diagrams, etc 2
- Croplands 2
- Brown, Lester R. (Lester Russell), 1934- 1
- Contamination of environment 1
- Family planning 1
License
- Creative Commons: Attribution-NoDerivatives 4.0 International 21
Format
- image/tiff 21