https://www.google.com/books/edition/Oeuvres_historiques_in%C3%A9dites/UmDfWtuxt...

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https://www.google.com/books/edition/Oeuvres_historiques_in%C3%A9dites/UmDfWtuxtDwC?hl=en&gbpv=1&dq=Gerardus+comes+Ekenisheim+castri...frater...episcopi+Brunonis&pg=PA73&printsec=frontcover

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