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†Williamsina Poulsen 1960
urn:lsid:organismnames.com:name:2683731
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22
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†Williamsina Poulsen 1960
Poulsen 1960. Fossils from the Late Middle Cambrian Bolaspidella Zone of Mendoza, Argentina. Mat-fys Medd danske Vid Selsk, 33(11) 1960: 1-42