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Claes Oldenburg: An Anthology
http://artnetweb.com/oldenburg/index.html
Frontispiece - Biography, exhibition index by the National Gallery of Art, Washington.
Claes Thure Oldenburg
http://askart.com/artist/o/claes_thure_oldenburg.asp
AskART.com's auction results, biographies, images and books pertaining to this sculptor.
PopArtists: Claes Oldenburg
http://www.popartists.com/Oldenburg/index.htm
New York City gallery features some images by the artist.