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Sidney Painter: The reign of King John. The Johns Hopkins University Press, Baltimore 2019, ISBN 978-1-4214-3516-9, S. 44; jhu.edu
Sidney Painter: The reign of King John. The Johns Hopkins University Press, Baltimore 2019, ISBN 978-1-4214-3516-9, S. 45; jhu.edu
Sidney Painter: The reign of King John. The Johns Hopkins University Press, Baltimore 2019, ISBN 978-1-4214-3516-9, S. 46; jhu.edu
Sidney Painter: The reign of King John. The Johns Hopkins University Press, Baltimore 2019, ISBN 978-1-4214-3516-9, S. 240, jhu.edu
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