1. The sand and gravel resources of the country south of Wrexham, Clwyd;Ball;Mineral Assessment Report, Institute of Geological Sciences,1982
2. The sand and gravel resources of the country around Mold, Clwyd;McL. Adlam;Mineral Assessment Report, Imitute of Geological Sciences,1982
3. Late Weichselian glaciation in the Cheshire-Shropshire Basin;Boulton;Nature, London,1965
4. Landforms and related glacial deposits in the Wheeler Valley area, Clwyd;Brown;Cambria,1977