1. Chemical Analysis of Ecological Materials.;Allen,1974
2. Soil physical parameters and earthworm populations associated with open-cast coal mining and land restoration.;Armstrong;AEENDO,1984
3. Compaction of a swelling clay soil by agricultural traffic: effects upon conditions for growth of winter cereals and evidence for some recovery of structure.;Blackwell;J. Soil Sci.,1985
4. The Restoration of Land: the Ecology of Derelict and Degraded Land.;Bradshaw,1980
5. Recultivation of refuse tips: soil ecological studies.;Brockmann,1980