. "1860Z"^^ . . . . "1920-06-20Z"^^ . . "1920Z"^^ . . . . "German chemist" . "Gattermann, Ludwig"@en . . . . "1860-04-20Z"^^ . "Ludwig Gattermann (20 April 1860 \u2013 20 June 1920) was a German chemist who contributed significantly to both organic and inorganic chemistry."@en . "Ludwig Gattermann"@en .