Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Window frame schedule, 1:100

Watercolor and graphite on white wove paper

Watercolor and gouache over graphite on heavy off-white wove paper

Black & brown chalk, brown wash, black ink & scratchwork on off-white wove ppr

Pastel on off-white wove paper?

Acrylic paint on paper

Charcoal and graphite on off-white laid paper, squared in graphite

Charcoal on off-white laid paper

Graphite on off-white wove paper

Graphite and watercolor on bristol board

Graphite on paper

Charcoal on off-white laid paper

Graphite on paper