Nithard, Histories, in Carolingian Chronicles, trans. Bernhard Walter Scholz and Barbara Rogers (Ann Arbor: University of Michigan Press, 1970), 164.
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Christopher Flynn, «‘Unconquered Louis Rejoiced in Iron’: Military History in East Francia Under King Louis the German (c. 825–876)», (PhD diss., University of Minnesota, 2020), 169, https://conservancy.umn.edu/items/c8c42ce4–4fc6–4042–b73e-ca38b8f08514.
