Proceedings of the Geologists� Association
Proceedings of the Geologists' Association > 2006 > 117 > 2 > 187-205
Proceedings of the Geologists' Association > 2008 > 119 > 2 > 193-201
Proceedings of the Geologists' Association > 2011 > 122 > 1 > 201-211
Proceedings of the Geologists' Association > 2011 > 122 > 3 > 460-471