Library of Michigan, Martha Griffiths Rare Book Room, Lansing, Michigan, 1993 (unbuilt project)

[Conceptual Sketch], untitled. Ink sketch with brown marker coloring on tracing paper, 18 x 21 1/4 inches [from photographic copy by Lance Burgharrdt]

Freeman Residence, Grand Rapids, Michigan, 1964-1966

[Conceptual Sketch], untitled. Red crayon drawing on tracing paper, 12x18 inches

Freeman Residence, Grand Rapids, Michigan, 1964-1966

[Conceptual Sketch], untitled. Red crayon drawing on tracing paper, 19 1/2 x 23 3/4 inches

Tougaloo College Master Plan, Tougaloo, Mississippi 1965-1971 (unbuilt project)

[Conceptual Sketches], untitled. Digital image only of black ink sketches on vellum and tracing paper

Tougaloo College Master Plan, Tougaloo, Mississippi 1965-1971 (unbuilt project)

[Conceptual Sketches], untitled. Digital image only of black ink sketches on shirt cardboard

Tougaloo College Master Plan, Tougaloo, Mississippi 1965-1971 (unbuilt project)

[Conceptual Sketches], untitled. Digital image only of blue ink sketches on vellum

Contemporary Arts Museum, Houston, Texas 1970-1972

[Conceptual Sketches], untitled. Black and red ink sketches on tracing paper, 12 x 16 1/2 inches

State University of New York, Purchase College Dance Instructional Facility, Purchase, New York, 1970-1976

[Conceptual Sketches #17], untitled. Black ink sketches on shirt cardboard, 8 x 10 3/4 inches

State University of New York, Purchase College Dance Instructional Facility, Purchase, New York, 1970-1976

[Conceptual Sketches #18], untitled. Black ink sketches on shirt cardboard, 8x14 inches

Subterranean Urban Systems Study, Graham Foundation Grant 1971-1974

[Conceptual Sketches], untitled. Digital image only of blue ink sketches on spiral notebook paper, initialed, 8 1/4 x 10 3/4 inches

University of Michigan Sports Services Building, Ann Arbor, Michigan, 1985-1990

[Early Roof Studies], untitled. Black and blue ink sketches on two sheets of tracing paper with blue and orange marker coloring, 18x28 inches. Second sketch is digital image only

University of Michigan Sports Services Building, Ann Arbor, Michigan, 1985-1990

[Schematic Design Sketch of] Section "C". Ink and red pencil drawing on blue-line print with blue and orange marker coloring, 12 1/4 x 40 3/4 inches

University of California Central Library Addition, San Diego, California, 1987-1993

[Conceptual Sketch], untitled. Blue ink sketch on tracing paper with green, orange and gray marker coloring, 12x32 inches

University of California Central Library Addition, San Diego, California, 1987-1993

[Section], untitled. Digital image only of black ink sketch on steno pad paper, 6x9 inches

Ohio State University College of Law Building Addition, Columbus, Ohio 1988-1993

[Early Conceptual Sketch], untitled. Digital image only of black ink sketch on graph paper, initialed