27 (1–2): 1–26. doi:10.1007/BF01938516. S2CID 46459932. Friedreich N (1876). "Ueber Ataxie mit besonderer Berücksichtigung der hereditären Formen" [About...
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Friedreich family. His father was psychiatrist Johann Baptist Friedreich (1796–1862), and his grandfather was pathologist Nicolaus Anton Friedreich (1761–1836)...
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