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Nazarov, B.B. and Ormiston, A.R., 1990. Biostratigraphic potential of Paleozoic radiolarians. In: Chuvashov, B.I., Zhamoida, A.I., and Amon, E.O. (resp. eds.) Radiolarians in biostratigraphy. Sverdlovsk: Publ. House of Urals Branch of USSR Acad. Sci. P. 3-25, 2 plates. Acknowledgement to E.O. Amon for doing the scanning.
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