1. Aitkenhead, N. , Barclay, W. J. , Brandon, A. , Chadwick, R. A. , Chisholm, J. I. , Cooper, A. H. & Johnson, E. W. 2002. British Regional Geology: the Pennines and adjacent areas. 4th edition. British Geological Survey, Keyworth, Nottingham.
2. Bromehead, C. E. N. , Edwards, W. , Wray, D. A. & Stephens, J. V. 1933. The geology of the country around Holmfirth and Glossop. Memoir of the Geological Survey of Great Britain, England and Wales, Sheet 86.
3. Die stratigraphische Verbreitung der nichtmarinen Muscheln in den penninischen Kohlenfeldern Englands;Calver;Zeitschrift der deutschen geologischen Gesellschaft,1956
4. DISTRIBUTION OF WESTPHALIAN MARINE FAUNAS IN NORTHERN ENGLAND AND ADJOINING AREAS
5. Calver, M. A. 1968b. Coal Measures invertebrate faunas. In: Murchison, D. & Westoll, T. S. (eds) Coal and Coal-bearing Strata. Oliver and Boyd, Edinburgh and London, 147–177.