Halle Civic Center, Museum, and Stadium, Halle, 1927-1928: Civic center, acoustical study: floor plan, 1:200

Black ink on paper

Graphite on paper

Graphite on paper and mounted

Graphite on paper

Graphite on paper

Watercolor on tan wove paper

Red, orange, and blue marker on paper

Graphite on paper

black and red inks, applied type, typewritten text, and collage elements on paper

Colored marker and black pen on legal paper adhered to paper

Colored marker and black pen on paper

Graphite and watercolor on paper