British regional geology : the Welsh borderland / by R.W. Pocock and T.H. Whitehead.

London : H.M.S.O., 1948.

iv, 83 pages, 11 pages of plates (1 folded) : illustrations, maps ; 25 cm

2nd ed.

At head of title: Department of Scientific and Industrial Resarch. Geological Survey and Museum

Includes bibliographic references