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Brockhaus-1837: Opitz
Brockhaus-1911: Boberfeld · Opitz
DamenConvLex-1834: Opitz, Martin
Eisler-1912: Opitz, Hugo · Opitz, H. G.
Herder-1854: Opitz
Meyers-1905: Boberfeld · Opitz
Pataky-1898: Opitz, Therese Adolf
Pierer-1857: Opitz