On Dorypterus Hoffmanni , Germar, from the Marl-slate fo Midderidge, Durham
- 1 February 1870
- journal article
- Published by Geological Society of London in Quarterly Journal of the Geological Society
- Vol. 26 (1-2), 623-641
- https://doi.org/10.1144/gsl.jgs.1870.026.01-02.58