Geology of the country around Wells and Cheddar (Explanation of one-inch Geological sheet 280, new series) by G. W. Green and F. B. A. Welch, with contributions by G. A. Kellaway [and others]. (Memoirs of the Geological survey of Great Britain: England and Wales.)
Geology of the country around Wells and Cheddar (Explanation of one-inch Geological sheet 280, new series) by G. W. Green and F. B. A. Welch, with contributions by G. A. Kellaway [and others].
(Memoirs of the Geological survey of Great Britain: England and Wales.)