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Leegaard Knudsen, A. 1997. Registrum Ecclesie Aboensis eller Åbo Domkyrkas Svartbok. The Black Book of the Cathedral. Facsimile version of the 1890 edition with a new introduction and translations of the original preface and the register of documents with brief introductions. Kansallisarkisto - Riksarkivet 1996.88 + 8 + XXXIII + 668 s., 2 ill. Historisk Tidsskrift. 16, (jan. 1997).