Geology of the South Wales coalfield memoir for 1:50,000 geological sheet 231 (England and Wales) Part V the country around Merthyr Tydfil
W. J. Barclay K Taylor; L. P Thomas; British Geological Survey
London H.M.S.O. 1988
Localização:
IGC - Instituto de Geociências
(554.2 B244g 3.ed. )(Acessar)