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By: Varker, W. JohnType: ArticleIn: PalaeontologyVolume: 10Series:Issue:Date: 1967Page Range: 124--141Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Higgins, A C - Varker, W. JohnType: ArticleIn: PalaeontologyVolume: 25Series:Issue:Date: 1982Page Range: 145--166Publication Info: London, Palaeontological Association, 1957-Subjects: