The Welsh borderland.
Earp, J. R.(John Rowland),author.
Hains, B. A.(Brian Arthur)
Pocock, R. W.(Roy Woodhouse),1887-
Whitehead, T. H.(Talbot Haes),1890-
Institute of Geological Sciences (Great Britain)
At head of title: Institute of Geological Sciences. List of maps pages105-106.
Previous edition, by R.W. Pocock and T.H. Whitehead, 1948.
bibl.
Geology