Columbia subject headings:
Art, Modern--20th century--Exhibitions.
Labor in art--Exhibitions.
Machinery in art--Exhibitions.
Work in art--Exhibitions.
Harvard subject headings:
Princeton subject headings:
Art, Modern--20th century--Themes, motives--Exhibitions.
Arts, Modern--20th century--Themes, motives--Exhibitions.
Industries in art--Exhibitions.
Labor in art--Exhibitions.
Machinery in art--Exhibitions.