On the Presence of the Zones of Anthracomya lenisulcata and Carbonicola ovalis in the Culm Measures of North Devon
- 1 September 1933
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 70 (10), 433-436
- https://doi.org/10.1017/s0016756800096515