Study, 1973

Graphite and ink on paper

26 x 48 inches

7 Pieces of Gray Felt, 1967

Ink on yellow graph paper

8 1/2 x 11 inches

Study for Double Tiered Sculpture: Plan View, 2000

Ink on paper

26 x 29 inches

Placed Parallel-Duplicates (without looking), 1967

Ink on paper

17 x 11 inches

Elements Compressed by Pushing from Various Directions, 1994-95

Ink and graphite on paper

9 x 12 1/2 inches

Untitled, 1968

Graphite and ink on paper

11 x 8 1/2 inches

Instalation Study, 1977

Ink, graphite and colored pencil on vellum and green paper

22 x 26 inches

Bunker Coagulation, 1995

Ink and graphite on paper

14 1/2 x 10 inches

Bunker Coagulation, 1996

Ink and graphite on paper

21 3/4 x 15 inches

Elements Compressed by Pushing from Various Directions, 1995

Ink and graphite on paper

9 1/8 x 12 3/8 inches

Installation Study, 1977

Ink, graphite and colored pencil on vellum and green paper

22 x 26 inches

Untitled, 1997

Graphite on paper

14 7/8 x 21 7/8 inches

Untitled, 1979

Ink, colored pencil and acrylic on paper

25 1/4 x 31 1/8 inches

Untitled (Porto 25), 1969-90

Gouache on black paper

20 3/4 x 21 5/8 inches

Untitled (wall floor), 1993

Pencil and colored pencil on paper

6 3/4 x 6 1/2 inches

Untitled, 2002

Graphite on paper

12 1/4 x 18 3/4 inches

Untitled (hotel room triptych), 2002

Graphite on paper

12 1/2 x 9 3/8 inches

Silent Diagram: Reading #14 + 9A, 2009-10

Polyester resin, concrete and aluminum

Dimensions variable