Two male workers inside a factory, ca.1930 

Three workers inside a factory, surrounded by large sacks, ca.1930 

Interior of an unidentified factory where a worker is "machining heat exchanger bodies", ca.1930 

Two men working at a machine inside an unidentified factory, ca.1942 

Unidentified factory interior, showing workers adjusting a small slab beneath a large machine, ca.1930 

Interior of an unidentified factory, showing two factory workers gripping a large piece of equipment, ca.1935 

Interior view of unidentified factory, showing a single worker standing near the turbines, ca.1935 

Factory worker in a kiln of a ceramics factory, ca.1935 

Factory workers operating on machinery, showing pallet of buckets in foreground, ca.1930 

Interior of a factory with metal workers, ca.1930 

Two factory women workers examining cylindrical components, ca.1930 

Workers in an unidentified food factory, ca.1930 

Interior view of an unidentified factory,showing workers from behind, ca.1940 

Interior view of an unidentified factory, perhaps a war (?) industry plant, ca.1942 

Unidentified factory interior, ca.1950 

Interior view of an unidentified factory, with a close-up of male worker, ca.1940 

Interior view of an unidentified factory, with two suited men inspecting metal parts, while workers are on an assembly line in background, ca.1942 

Man in an unidentified factory interior, ca.1940 

Workers crating large products for the Montgomery Ward Company , ca.1930 

Close-up of a man working a machine inside an unidentified factory, ca.1935