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Dangos 5 canlyniad
Disgrifiad archifolEarly personalia,
Early personalia,
Research papers: source materials,
Research papers: source materials,
Research papers: correspondence,
Research papers: correspondence,
Miscellanea.
Miscellanea.
Research papers: notes, drafts and texts of articles, etc,
Research papers: notes, drafts and texts of articles, etc,