1. Ajaz A and Parry R H G 1974 An unconfined direct tension test for compacted clays. J. Test. Eval. 2, 163–172.
2. Armstrong W, Booth T C, Priestly P and Read D J 1976 The relationship between soil aeration, stability and growth of Sitka spruce (Picea sitchensis (Bong.) Carr) on upland peaty gleys. J. Appl. Ecol. 13, 585–591.
3. Bishop D M and Stevens M E 1964 Landslides on logged areas in southeast Alaska. U.S. Dept. Agr. For. Serv. Res. Pap. NOR-1.
4. Booth TC 1974 Silviculture and management of high-risk forests in Great Britain. Irish For. 31, 145–153.
5. Booth T C 1979 Wind flow over topography. For. Comm. Rept. For. Res. 1979, HMSO, London 19–20.