Columbia subject headings:
Harvard subject headings:
Labor movement--Austria--Mürz River Valley--History.
Steel industry and trade--Austria--Mürz River Valley--History.
Working class--Austria--Mürz River Valley--History.
Princeton subject headings:
Labor movement--Austria--Mürz River Valley--History.
Steel industry and trade--Austria--Mürz River Valley--History.
Working class--Austria--Mürz River Valley--History.