Proceedings of the Geologists� Association
Proceedings of the Geologists' Association > 2007 > 118 > 4 > 375-380
Proceedings of the Geologists' Association > 2013 > 124 > 6 > 967-972
Proceedings of the Geologists' Association > 2014 > 125 > 4 > 432-436
Proceedings of the Geologists� Association > 2016 > 127 > 6 > 691-698