Dogger: sheet 55°N/02°E
Sea Bed Sediments and Holocene Geology, 1:250 000 series British Geological Survey, Geological Survey of The Netherlands.
Jeffery, D.H., C. Graham, S. Wright, C. Laban & R.T.E. Schüttenhelm, 1990
Sea Bed Sediments and Holocene Geology, 1:250 000 series British Geological Survey, Geological Survey of The Netherlands.
Jeffery, D.H., C. Graham, S. Wright, C. Laban & R.T.E. Schüttenhelm, 1990