Atkinson, K. (1968). The Genus Sigmoilopsis Finlay 1947 from Cardigan Bay, Wales. Contributions from the Cushman Foundation for Foraminiferal Research. 19(4): 160-162.
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Atkinson, K.
1968
The Genus Sigmoilopsis Finlay 1947 from Cardigan Bay, Wales.
Contributions from the Cushman Foundation for Foraminiferal Research