1. Growth in demand for U.S. crop and animal production by 2005;Abel,1982
2. The concept of sustainable economic development;Barbier;Environmental Conservation,1987
3. Scarcity and Growth: the Economics of Natural Resource Availability;Barnett,1963
4. Sustainability of Farmed Lands: Current Trends and Thinking;Bentley,1985
5. The agricultural crisis as a crisis of culture;Berry,1984