Hall, J.; & Clarke, J. M. (1892–1894). An introduction to the study of the genera of Palaeozoic Brachiopoda. Natural History of New York, New York State Geological Survey. 8: (part 1) 1-367, plates 1-20; (part 2) 1-394, plates 21-84.
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Hall, J.; & Clarke, J. M.
1892–1894
An introduction to the study of the genera of Palaeozoic Brachiopoda
Natural History of New York, New York State Geological Survey