1. Armstrong, A.C. 1980. Drainage Statistics 1978?80.FDEU Technical Report 80/1, Cambridge.
2. Armstrong, A.C. 1983. A heuristic model of soil water regimes in clay soils in the presence of mole drainage.Agricultural Water Management 6: 191?201.
3. Armstrong, A.C. 1984. The hydrology and water quality of a drained clay catchment, Cockle Park, Northumberland (pp 153?168). In: Burt, T.P. & Walling, D.E. (Eds). Catchment experiments in fluvial geomorphology.Geobooks, Norwich.
4. Armstrong, A.C. 1987. Soil water management inputs to crop simulation models (pp 91?104). In: Feyen, J. (Ed). Agriculture, simulation models for cropping systems in relation to water management.Eur 10869.
5. Armstrong, A.C. & Arrowsmith, R. 1986. Field evidence for a biporous soil water regime in clay soils.Agricultural Water Management 11: 117?125.