1. The plant nutrient content of rainwater;ALLEN;J. Ecol.,1968
2. AVON and DORSET RIVER AUTHORITY (1970) Survey of Water Resources and future demands. Bournemouth.
3. Studies on the ecology of rivers. 1. On the distribution of macrophytic vegetation in the rivers of Britain;BUTCHER;J. Ecol.,1933
4. CASEY H. (1969) The chemical composition of some Southern English chalk streams and its relation to discharge. Ass. River Authorities Yb. 1969. 100–113.
5. CASEY H. (in press) Variation in the chemical composition of the R. Frome from 1965–1972. Freshwater Biol.