Geology of the country around Montgomery and the Ordovician rocks of the Shelve area : memoir for 1:50 000 geological sheet 165 with part of sheet 151 (Welshpool) (England and Wales) /
Cave, R.(Richard),1929-
Hains, B. A.(Brian Arthur)
Jackson, A. A.,Ph. D.
British Geological Survey.
London : Stationery Office,
2001.
Geology, Stratigraphic
Formations (Geology)
Formations (Geology)