1. BGS. 2018. “Geology of Britain Viewer.” http://mapapps.bgs.ac.uk/geologyofbritain/home.html
2. Chadwick, A. M. 2010. “Fields for Discourse. Landscape and Materialities of being in South and West Yorkshire and Nottinghamshire during the Iron Age and Romano-British Periods.” Unpublished PhD thesis, University of Wales, Newport. http://ads.ahds.ac.uk/cateralogue/library/theses/chadwick_phd_2010/
3. 4. NORTHERN ENGLAND