grupaok:Paul Klee, Nichtkomponiertes im Raum (Uncomposed in Space), 1929, as seen on the cover of th
grupaok:Paul Klee, Nichtkomponiertes im Raum (Uncomposed in Space), 1929, as seen on the cover of the Blackwell translation of Henri Lefebvre’s The Production of Space, 1991. -- source link
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