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Creator
- Naff, Thomas 13
- Holdren, John 1
- Homer-Dixon, Thomas F. 1
- Kirk, Elizabeth J. 1
- Lipschutz, Ronnie D. 1
Topic
- Politics and government 13
- Hydrology 5
- Technology 5
- Demography 3
- Economics 3
- Population 2
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Decade
- 1990-1999 13