1. Hierarchy: Perspectives for Ecological Complexity;Allen,1982
2. Explanatory supplement to the ecoregions map of continents;Bailey;Environmental Conservation,1989
3. Land Quality and Food Security in Asia. Response to Land Degradation;Beinroth,2001
4. Land Related Stresses in Agroecosystems. Stressed Ecosystems and Sustainable Agriculture;Beinroth,1994
5. Eroding Soils: The Off-Farm Impacts;Clark,1985