Ward, J. (1890). The Geological Features of the North Staffordshire Coal-fields, Their Organic Remains, Their Range and Distribution: With a Catalogue of the Fossils of the Carboniferous System of North Staffordshire. Transactions of the North Staffordshire Institute of Mining and Mechanical Engineers. 10: 1-189, i-ix, pl. 1-9.
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Ward, J.
1890
The Geological Features of the North Staffordshire Coal-fields, Their Organic Remains, Their Range and Distribution: With a Catalogue of the Fossils of the Carboniferous System of North Staffordshire
Transactions of the North Staffordshire Institute of Mining and Mechanical Engineers