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R. B. Rickards, J. E. Hutt & W. B. N. Berry 1977. Evolution of the Silurian and Devonian Graptoloids. Bulletin British Museum (Natural History) Geology, Volume 28, number 1. 120 pp., 55 text-figures, 6 pls. London. Price £11.90. ISSN 0007 1471.
Published online by Cambridge University Press: 01 May 2009
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- Copyright © Cambridge University Press 1978