The sand and gravel resources of the country north of Wrexham, Clwyd description of 1:25000 resource sheet SJ35 and part of SJ25 /
Dunkley, P. N.
Institute of Geological Sciences (Great Britain)
London H.M.S.O.
1981
At head of title: Institute of Geological Sciences
Bibliography: p87
Map (1 folded sheet) in pocket
Sand
Gravel