Gerhard Rühm Untitled (From the Project Concrete Poetry; Wer Ist Wer?) (Untitled [From the Project... 1955
Gerhard Rühm Untitled (From the Project Concrete Poetry; Scharf) Untitled [From the Project Concrete... 1955
Gerhard Rühm Untitled (From the Project Concrete Poetry; Haar) (Untitled (From the Project Concrete... 1955
Gerhard Rühm Untitled (From the Project Concrete Poetry; Nacht) (Untitled [From the Project Concrete... 1959
Jesús Ruiz Durand Carteles de la Reforma Agraria Peruana (Posters of the Peruvian Agrarian Reform) 1969-1975
Richard Serra, Ellsworth Kelly, Bruce Nauman, Joseph Kosuth, Edward Ruscha Leo Castelli 90th Birthday Portfolio 1997
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