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Popov, L. E., Nikitin, I. F. and Sokiran, E. V. 1999. The earliest atrypides and athyridides (Brachiopoda) from the Ordovician of Kazakhstan. Palaeontology. Vol. 42(4), pp. 625-661.
Project 4838: L. E. Popov, I. F. Nikitin, E. V. Sokiran. 1999. The earliest atrypides and athyridides (Brachiopoda) from the Ordovician of Kazakhstan. Palaeontology. 42 (4):625-661.
This project has 1 bibliographic reference.