Columbia subject headings:
Marcks, Gerhard--Exhibitions.
Marcks, Gerhard--Notebooks, sketchbooks, etc.
Marcks, Gerhard--Travel--Namibia.
Namibia--Pictorial works.
Harvard subject headings:
Marcks, Gerhard--Journeys--Namibia.
Marcks, Gerhard.
Namibia--In art.
Princeton subject headings: