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By: Matten, L C - Lacey, William Springthorpe, - Edwards, DType: ArticleIn: PhytologiaVolume: 32Series:Issue:Date: 1975Page Range: 299--303Publication Info: Bronx Park, New York H.A. Gleason and H.N. MoldenkeSubjects:
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By: Hibbert, F Alan - Lacey, William Springthorpe,Type: ArticleIn: PalaeontologyVolume: 12Series:Issue:Date: 1969Page Range: 420--440Publication Info: London, Palaeontological Association, 1957-Subjects: