Dinoflagellate cyst zonation of the English Jurassic /
Woollam, R.
Riding, J. B.
Davey, R. J.
Molyneux, S. G.
Warrington, Geoffrey.
Institute of Geological Sciences (Great Britain)
London HMSO
1983
With a folding chart in a pocket at the end
Geology, Stratigraphic