A. Martinsson (ed.) 1977. The Silurian–Devonian Boundary. Final report of the Committee on the Silurian–Devonian Boundary within IUGS Commission on Stratigraphy and a state of the art report for Project Ecostratigraphy. International Union of Geological Sciences, series A, number 5. vi + 349 pp., 111 figs. Stuttgart: E. Schweizerbart'sche Verlag. Price DM 98.00; U.S. $42.20. ISBN 3 510 56003 5.
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