Richardson L. & Paris E. T. (1908). On the stratigraphical distribution of the Inferior-Oolite echinoids of the west of England. Proceedings of the Cotteswold Naturalist Field Club, 18, 73-82, pl. 8.
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Richardson L. & Paris E. T.
1908
On the stratigraphical distribution of the Inferior-Oolite echinoids of the west of England.
Proceedings of the Cotteswold Naturalist Field Club, 18, 73-82, pl. 8