Bulman, O. M. B. (1955). Part V – Grapholithina, with sections on Enteropneusta and Pterobranchia. pp. xviii-V101 in Moore, R. C. (ed.), Treatise on Invertebrate Paleontology. University of Kansas Press and The Geological Society of America, Lawrence, Kansas.
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Bulman, O. M. B.
1955
Part V – Grapholithina, with sections on Enteropneusta and Pterobranchia. pp. xviii-V101 in Moore, R. C. (ed.), Treatise on Invertebrate Paleontology. University of Kansas Press and The Geological Society of America, Lawrence, Kansas.