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Brockhaus-1911: Ferri
Eisler-1912: Ferri, Luigi
Lemery-1721: Lignum ferri
Meyers-1905: Castelnuóvo, Enrico · Ferri-kalĭum cyanātum · Ferri
Pagel-1901: Morselli, Enrico Agostino · Bottini, Enrico · Albanese, Enrico
Pierer-1857: Limatūra ferri · Ferri [2] · Ferri [1]