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1852 72. Burton on Trent, Staffor … Geologic Atlas 72. Burton on Trent, Staffor … |
1852 77. Holyhead, N Quad. Geologic Atlas 77. Holyhead, N Quad. |
1852 78. Bangor, NE Quad. Geologic Atlas 78. Bangor, NE Quad. |
1852 78. N. Anglesey, Bangor, NW … Geologic Atlas 78. N. Anglesey, Bangor, NW … |
1852 78. Bangor, SE Quad. Geologic Atlas 78. Bangor, SE Quad. |