. "1892-04-25Z"^^ . . . . "Estonian explorer and geologist" . . . "Ditmar, Karl von"@en . "1892Z"^^ . . "Karl von Ditmar"@en . . . "Karl von Ditmar (sometimes Carl von Ditmar) (8 September [O.S. 27 August] 1822 in V\u00E4ndra \u2013 25 April [O.S. 13 April] 1892 in Tartu) was a Baltic German geologist and explorer, who travelled in and contributed to the scientific understanding of Kamchatka."@en . "1822Z"^^ . "1822-09-08Z"^^ . . . . .