Paper Factory Building, Alfeld-Gronau, 1923-1924: Elevation from courtyard

Graphite and watercolor on paper

Graphite on cream wove paper

Black crayon on paper

Colored marker on paper

Black crayon on paper

Graphite and ink on paper

Black and green marker on paper

Graphite on paper

Black, blue and yellow crayon ; graphite on paper

Graphite on paper

Graphite on cream wove paper

Graphite with blue, yellow and brown crayon on paper