British regional geology : North Wales /
B. Smith and T. Nevil le George
- London : H. M. Stationery Office , 1948
- vi, 89 p.: ill., maps 1 fold ; 25 cm.
At head of title: Department of Scientific and Industrial Research. Geological Survey and Museum
Includes bibliography
Geology ----Wales----
Great Britain. Geological Survey London -- Museum of Practical Geology