Rechtschreibung
by Drosdowski, Matthias Wermke, Konrad Duden et al.
1929 647 pages ger
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Günter Grass
1959 ★ 3.0
Michael Ende
1992 ★ 3.8
Ludwig Hugo Köhler
1953
Walter Benjamin
1969
Ambrose Bierce
1911 ★ 3.3
Friedrich Kluge
1889