1. Appendix 9 ‘Abundance Scales’;Anonymous,1996
2. The Pleistocene rivers of the English Channel region;Antoine;Journal of Quaternary Science,2003
3. Classification of large-scale subaqueous bedforms: a new look at an old problem;Ashley;Journal of Sedimentary Petrology,1990
4. Portland. 1:250000, Sea Bed Sediments and Quaternary Geology;BGS,1983
5. DigSBS250. 1:250,000 Scale Seabed Sediment Digital Maps;BGS,2002