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| Paul Stevenson Oles. Perspective study for skylight system with bridge, National Gallery of Art East Building, 1 February 1971. Graphite on paper |
| Copyright © National Gallery of Art, Washington D.C. |
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| Paul Stevenson Oles. Perspective study for skylight system with bridge, National Gallery of Art East Building, 1 February 1971. Graphite on paper |
| Copyright © National Gallery of Art, Washington D.C. |