Bibliographic Citation
| - Imi Knoebel : Help, oh, help ... : [an exhibition of the Nationalgalerie at the Neue Nationalgalerie, Berlin, May 23 to August 9, 2009 / edited by Eugen Blume and Udo Kittelmann ; texts Eugen Blume, Thilo Bock, Martin Schulz, Achim Kubinski, Heinrich Dunst, Klaus Lueb, Johannes Stüttgen ; translations Allison Moseley] / Berlin : Nationalgalerie Staatliche Museen zu Berlin
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