. . . "1843-05-06Z"^^ . . . . . "1918-05-01Z"^^ . "Grove Karl Gilbert (May 6, 1843 \u2013 May 1, 1918), known by the abbreviated name G. K. Gilbert in academic literature, was an American geologist."@en . "Gilbert, Grove"@en . "1918Z"^^ . . . "American geologist" . . "1843Z"^^ . . . "Grove Karl Gilbert"@en . .