Davidson, T. (1881). On genera and species of spiral-bearing Brachiopoda, from specimens developed by the Rev. Norman Glass: with notes on the results obtained by Mr. George Maw from extensive washings of the Wenlock and Ludlow shales of Shropshire. Geological Magazine. 8: 1-12.
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Davidson, T.
1881
On genera and species of spiral-bearing Brachiopoda, from specimens developed by the Rev. Norman Glass: with notes on the results obtained by Mr. George Maw from extensive washings of the Wenlock and Ludlow shales of Shropshire