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.., .. (1969) (Pachydiscidae) // , . , No.6, , .3-20, 11 . [Atabekyan, A.A., Akopyan, V.T. 1969: Pozdnemelovye ammonity Armyanskoj SSR (Pachydiscidae). Izvestiya AN Armyanskoj SSR, nauki o zemle 22(6), 3-20, Pls. 1-11. [In Russian].]



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