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

[Early Roof Study], untitled. Blue ink sketch on tracing paper, 12 x 24 1/2 inches [from photographic copy by Lance Burgharrdt]

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

[Early Roof Study], untitled. Black and blue ink sketch on tracing paper with blue and orange marker coloring, 18x28 inches [from photographic copy by Lance Burgharrdt]

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