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