%0 Book %A Strahan, Aubrey. %E Tiddeman, R. H. %E Gibson, Walcot. %I H.M.S.O. %D 1903 %C London %G English %B Memoirs of the Geological Survey of Great Britain. England and Wales. %T The geology of the South Wales coal-field. being an account of the region comprised in sheet 248 of the map