1. Chemical Analysis of Ecological Materials;Allen,1974
2. Soil classification for England and Wales (higher categories);Avery;Soil Surv. Tech. Monogr.,1980
3. Nature Management by Grazing and Cutting;Bakker,1989
4. The reconstruction of ecosystems;Bradshaw;J. Appl. Ecol.,1983
5. The restoration of vegetation on derelict land produced by industrial activity;Bradshaw,1978