1. Aggregate Industries, 2007. Quarry Geodiversity Action Plan, Bardon Hill.
2. Aggregate Industries, 2010. Quarry Geodiversity Action Plan, Croft Quarry.
3. Opening access to pit’s geological past;Baker;Earth Heritage,2016
4. Green Chain Walk Geotrail;Baker,2016
5. London’s Foundations – Protecting the Geodiversity of the Capital;Barron,2009