Bertha Katscher (also spelled, Berta; pseudonyms: Ludwig Ungar, Albert Kellner, Ludwig Kölle, Ludmilla Kölle; 12 June 1860 – 16 September 1903) was an Austrian Empire-born Hungarian writer.
Bertha Katscher (also spelled, Berta; pseudonyms: Ludwig Ungar, Albert Kellner, Ludwig Kölle, Ludmilla Kölle; 12 June 1860 – 16 September 1903) was an Austrian Empire-born Hungarian writer.