Columbia subject headings:
Architecture, Industrial--Germany--Pictorial works.
Industrial archaeology--Germany--Pictorial works.
Harvard subject headings:
Architecture, Industrial--Germany--Pictorial works.
Industrial archaeology--Germany--Pictorial works.
Photography, Industrial--Germany.
Princeton subject headings:
Architecture, Industrial--Germany--Pictorial works.
Architecture, Modern--20th century--Germany--Pictorial works.
Industrial archaeology--Germany--Pictorial works.
Industrial buildings--Germany--Pictorial works.