A Monograph of the British Ordovician and Silurian Bellerophontacea. Part I. Pages 1–48; Plates I–VIII
- 1 December 1920
- journal article
- research article
- Published by Informa UK Limited in Monographs of the Palaeontographical Society
- Vol. 72 (345), 1-48
- https://doi.org/10.1080/02693445.1920.12035580