Hawkins, H. L. 1935. Two genera of Carboniferous Echinoidea (Lepidocidaris and Hyattechinus) new to Britain. Quarterly Journal of the Geological Society of London 91, 239-250.
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Hawkins, H. L.
1935
Two genera of Carboniferous Echinoidea (Lepidocidaris and Hyattechinus) new to Britain
Quarterly Journal of the Geological Society of London