Union of 3 & 4 w/2 Black Triangles & 7 Pencil Lines, 3 on Top, 4 Underneath by Vogel, Herbert, Mr. and Mrs., Tuttle, Richard, National Gallery of Art — VisualArtsDB

Union of 3 & 4 w/2 Black Triangles & 7 Pencil Lines, 3 on Top, 4 Underneath by Vogel, Herbert, Mr. and Mrs., Tuttle, Richard, National Gallery of Art — VisualArtsDB