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1.
The future of synthetic materials the petroleum connection Christopher Flavin by Series: Worldwatch Paper; 35
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Washington Worldwatch Institute 1980
Availability: Items available for loan: Directorate of Library Services (UDSM) (2)Collection, call number: IRA-Institute of Resources Assessment IRA HD9579.C32F55, ...

2.
Food or fuel new competition for the world's cropland Lester R. Brown by Series: Worldwatch Paper; 35
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Washington Worldwatch Institute 1980
Availability: Items available for loan: Directorate of Library Services (UDSM) (1)Collection, call number: IRA-Institute of Resources Assessment IRA HD9502.5.A432B76.

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