Oskar Kellner
Oskar (Oscar) Johann Kellner (13 May 1851 – 12 September 1911) was a German agricultural scientist (''Agrikulturchemiker, Tierphysiologe'').
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Oskar (Oscar) Johann Kellner (13 May 1851 – 12 September 1911) was a German agricultural scientist (''Agrikulturchemiker, Tierphysiologe'').
Provided by Wikipedia