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Brockhaus-1911: Kalium · Hypermangansaures Kalium · Blausaures Kalium
Herder-1854: Kalium
Lueger-1904: Kalium · Chlorsaures Kalium · Arsensaures Kalium
Meyers-1905: Ferro-kalĭum cyanātum · Ferri-kalĭum cyanātum · Auro-Natrium chlorātum · Kalĭum · Kalium
Pierer-1857: Kalium