Hall, J.; Whitfield, R. P. (1869-1870). Preliminary notice of the lamellibranchiate shells of the upper Helderberg, Hamilton and Chemung groups, with others from the Waverly sandstones. Part 2. New York State Museum, Albany, 80 pp.
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Hall, J.; Whitfield, R. P.
1869-1870
Preliminary notice of the lamellibranchiate shells of the upper Helderberg, Hamilton and Chemung groups, with others from the Waverly sandstones. Part 2