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Brockhaus-1809: Der Indigo
Brockhaus-1911: Indigo [2] · Indigo
Herder-1854: Indigo
Lemery-1721: Indigo
Lueger-1904: Indigo
Meyers-1905: Indigo
Pierer-1857: Wilder Indigo · Indigo · Georgia-Indigo