1. Grand Canal;Durrell,1990
2. Our Common Future;World Commission on Environment and Development,1987
3. Natural resource consumption and its impacts in the Western world: Impacts of increasing per capita consumption;Boyden;Ambio,1992
4. The case for methodological pluralism;Norgaard;Ecological Economics,1989
5. The edge of ignorance: A survey of science;Ridley;The Economist,1991