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Nazarov, B.B. and Ormiston, A.R. 1984. Tentative system of Paleozoic Radiolaria. In: Morphology, biology and evolution of radiolarians. Resp. editors M.G. Petrushevskaya, S.D. Stepanjants. Leningrad: Nauka Publ. P. 64-87. 3 figs., 2 plates. In Russian, English res. Acknowledgement to E.O. Amon for doing the scanning.
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