Columbia subject headings:
Böll, Heinrich, 1917-1985--Notebooks, sketchbooks, etc.
Drawing.
Harvard subject headings:
Böll, Heinrich, 1917-1985--Notebooks, sketchbooks, etc.
Böll, Heinrich, 1917-1985--Notebooks, sketchbooks, etc.
Drawing
Princeton subject headings:
Böll, Heinrich, 1917-1985--Notebooks, sketchbooks, etc.
Drawing.