por Barnes, J. W. (John Wykeham), 1921- [autor] | Open University.
por Barnes, J. W. (John Wykeham), 1921- [autor].
por Lisle, Richard J [editor] | Brabham, Peter [editor] | Barnes, J. W. (John Wykeham), 1921- [editor] | Barnes, J. W. (John Wykeham), 1921-. Basic geological mapping.