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1. Note on a marine band in the Denbighshire coalfield

by Simpson, Henry H.

Source: Geological magazine : Vol. 72 Iss. 1-12 Year. 1935Material type: Article Article; Format: print Availability: Items available for reference: (1).

2. Note on anthraconauta calcifera in the upper coal measures of Denbighshire

by Simpson, Henry H.

Source: Geological magazine : Vol. 74 Iss. 1-12 Year. 1937Material type: Article Article; Format: print Availability: Items available for reference: (1).

3. Note on the zone of Anthraconauta phillipsi in the Denbighshire coalfield

by Simpson, Henry H.

Source: Geological magazine : Vol. 73 Iss. 1-12 Year. 1936Material type: Article Article; Format: print Availability: Items available for reference: (1).

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