Potter, I. C., Bird, D. J., Claridge, P., Clarke, K., Hyndes, G. and Newton, L.
Fish fauna of the Severn Estuary. Are there long-term changes in abundance and species composition and are the recruitment patterns of the main marine species correlated?
Journal of Experimental Marine Biology and Ecology, 258 (1).
Available from: http://eprints.uwe.ac.uk/7016