Franz Erhard Walther, Work Drawing: Opposite, 1967 [MoMA, New York, NY. © 2021 Franz Erhard Walther
Franz Erhard Walther, Work Drawing: Opposite, 1967 [MoMA, New York, NY. © 2021 Franz Erhard Walther / Artists Rights Society (ARS), New York / VG Bild-Kunst, Germany] -- source link
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