Description of erect Sigillariæ with conical Tap Roots, found in the Roof of the Sydney Main Coal, in the Island of Cape Breton
- 1 February 1849
- journal article
- Published by Geological Society of London in Quarterly Journal of the Geological Society
- Vol. 5 (1-2), 354-360
- https://doi.org/10.1144/gsl.jgs.1849.005.01-02.39