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Hopkins, Melanie J. 2019. Phylogenetic analysis and revision of the trilobite subfamily Balnibarbiinae (Olenidae). American Museum Novitates. (3928) p. 20.
Hopkins, M. J. 2019. Phylogenetic analysis and revision of the trilobite subfamily Balnibarbiinae (Olenidae). American Museum Novitates. Vol. 3928, pp. 1-20.