Pycnaspis splendens, New Genus, New Species, a New Ostracoderm from the Upper Ordovician of North America
- 1 January 1958
- journal article
- Published by Smithsonian Institution in Proceedings of the United States National Museum
- Vol. 108 (3391) , 1-23
- https://doi.org/10.5479/si.00963801.108-3391.1