Banner, F. T.; Copestake, P.; White, M. R. (1993). Barremian-Aptian Praehedbergellidae of the North Sea area: a reconnaisance. Bulletin of the British Museum (Natural History). Geology. 49: 1-30.
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Banner, F. T.; Copestake, P.; White, M. R.
1993
Barremian-Aptian Praehedbergellidae of the North Sea area: a reconnaisance
Bulletin of the British Museum (Natural History). Geology.