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http://www.getty.edu/research/conducting_research/digitized_collections/lissitzky/

http://www.eldritchpress.org/el/el.html

http://www.the-artists.org/ArtistView.cfm?id=8A01F8CA-BBCF-11D4-A93500D0B7069B40

http://www.guggenheimcollection.org/site/artist_bio_90.html