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By: Kennedy, W. J. (William James) - Jakobson, M E - Johnson, R TType: ArticleIn: PalaeontologyVolume: 12Series:Issue:Date: 1969Page Range: 549--554Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Mckerrow, W S - Johnson, R T - Jakobson, M EType: ArticleIn: PalaeontologyVolume: 12Series:Issue:Date: 1969Page Range: 56--83Publication Info: London, Palaeontological Association, 1957-Subjects: