E. Hitchcock. 1862. Supplement to the Ichnology of New England. Proceedings of the American Academy of Arts and Sciences 6:84-95
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Bibliographie (1)
C. H. Hitchcock. 1865. Appendix [B]. Descriptive catalogue of the specimens in the Hitchcock Ichnological Cabinet of Amherst College. Supplement to the Ichnology of New England. A Report to the Government of Massachusetts in 1863