1. A Glossary of a Thousand-and-one Terms Used in Conchology;Arnold,1965
2. Early Cambrian fossils from South Australia;Bengtson,1990
3. Scenella barrandei (Mollusca) from the Middle Cambrian of Baltoscandia;Berg-Madsen;Norsk Geologisk Tidsskrift,1986
4. On some fossils from the Primordial rocks of Newfoundland;Billings;Canadian Naturalist and Geologist,1872
5. Microfossils and small shelly fossils from the Lower Cambrian Hyolithes Limestone at Nuneaton, English Midlands;Brasier;Geological Magazine,1984