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Brockhaus-1911: Burdach [2] · Burdach
Eisler-1912: Burdach, Karl Friedr.
Herder-1854: Burdach [2] · Burdach [1]
Meyers-1905: Burdach
Pagel-1901: Burdach, Ernst
Pataky-1898: Burdach, Hans
Pierer-1857: Burdach