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By: Harper, David A TType: ArticleIn: Bulletin of the British Museum (Natural History) GeologyVolume: 43Series:Issue:Date: 1988Page Range: 45--52Publication Info: London, BM(NH),Subjects:
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By: Garassino, Alessandro - Harper, David A TType: ArticleIn: Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale in MilanoVolume: 145Series:Issue: 2Date: 2004Page Range: 329--336Publication Info: Milano, Società Italiana di Scienze Naturali ; Museo Civico di Storia Naturale in Milano,Subjects:
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By: Hanken, Nils-Martin - Harper, David A TType: ArticleIn: PalaeontologyVolume: 28Series:Issue:Date: 1985Page Range: 243--254Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Harper, David A T - Mitchell, William Ian - Owen, Alan W - Romano, MichaelType: ArticleIn: Bulletin of the British Museum (Natural History) GeologyVolume: 38Series:Issue:Date: 1985Page Range: 287--308Publication Info: London, BM(NH),Subjects: