Late Ordovician and Early Silurian turbidite systems in the Welsh Basin /
International Sedimentological Congress(13th :1990 :Nottingham, England)
Smith, Ru.
Waters, Dick.
Davies, Jerry.
British Sedimentological Research Group.
[Cambridge?] : British Sedimentological Research Group,
c1991.
"Compiled for the 13th International Sedimentological Congress, Nottingham U.K. 1990."