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1857 40. Haverfordwest. Geologic Atlas 40. Haverfordwest. |
1857 41. Caermathen. Geologic Atlas 41. Caermathen. |
1857 42. Brechnock, Brecon, NW Qu … Geologic Atlas 42. Brechnock, Brecon, NW Qu … |
1857 42. Brecon, SE Quad. Geologic Atlas 42. Brecon, SE Quad. |