Jones, Michael. Conan (IV), duke of Brittany (c. 1135–1171). In Oxford Dictionar...

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Jones, Michael. Conan (IV), duke of Brittany (c. 1135–1171). In Oxford Dictionary of National Biography (ODNB). United Kingdom: Oxford University Press (2012), https://doi.org/10.1093/ref:odnb/59576.

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