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Chapter 27 Cambrian–Ordovician cephalopod palaeogeography and diversity | Geological Society, London, Memoirs
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Chapter 27 Cambrian–Ordovician cephalopod palaeogeography and diversity | Geological Society, London, Memoirs
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Trilobite biostratigraphy of the Cambrian 5 and Drumian stages, Series 3 (Laurentian Delamaran, Topazan, and Marjuman stages, Lincolnian Series) of the lower Emigrant Formation at Clayton Ridge, Esmeralda County, Nevada | Journal
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