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