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Incoming Resources
- Alternatives to the internal combustion engine, impacts on environmental quality, by Robert U. Ayres and Richard P. McKenna
- The life cycle of copper, its co-products and byproducts, by Robert U. Ayres, Leslie W. Ayres and Ingrid Råde ; with contributions from Roland Geyer [and others]
- Uncertain futures, challenges for decision-makers, Robert U. Ayres
- Technological forecasting and long-range planning, Robert U. Ayres
- Turning point, an end to the growth paradigm, Robert U. Ayres