Author:
Birch Richard,McCobb Lucy M.E.
Reference75 articles.
1. Class Trilobita Walch, 1771;Adrain,2011
2. Lower Cambrian Ptychopariid trilobites from Scandinavia;Ahlberg;Sveriges Geologiska Undersökning,1978
3. Lower Cambrian fossils from the Hell’s Mouth Grits, St Tudwal’s Peninsula, North Wales;Bassett;Journal of the Geological Society, London,1976
4. Outline of a natural classification of the trilobites;Beecher;American Journal of Science Series,1897