Smith, A. B. & Wright, C. W. 1989. British Cretaceous echinoids. Part 1, General introduction and Cidaroida. Monographs of the Palaeontographical Society 141 (578), 1-101.
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Smith, A. B.; Wright, C. W.
1989
British Cretaceous echinoids. Part 1, General introduction and Cidaroida