Identifiant pérenne de la notice : 235354848
Notice de type
Personne
Geological survey of Great Britain (England and Wales) 1:25 000 series : Classical
areas of British Geology, solid. Parts of Sheets SO 05, 06, 15 & 16, Llandrindod Wells
Ordovician Inlier / Geological survey of Great Britain (England and Wales) ; made
and published by Director General of the Ordnance Survey for the Institute of Geological
Sciences ; geological survey by W. J. Pugh and O. T. Jones ; compiled by J. R. Earp,
1977