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Brockhaus-1911: Jachin und Boas · Boas [2] · Boas
Herder-1854: Boas
Meyers-1905: Boas [2] · Boas [1] · Kalli...
Pagel-1901: Boas, Ismar
Pierer-1857: Jachin u. Boas · Boas [2] · Boas [1]