Columbia subject headings:
Businesspeople--Greece--History--19th century.
Businesspeople--Greece--History--20th century.
Kouppas, Achilleas, 1852-
Labor--Greece--Piraeus--History--20th century.
Machine-tool industry--Greece--History--19th century.
Machine-tool industry--Greece--History--20th century.
Piraeus (Greece)--Social conditions--20th century.
Harvard subject headings:
Businesspeople--Greece--History--19th century.
Businesspeople--Greece--History--20th century.
Kouppas, Achilleas, 1852-
Labor--Greece--Piraeus--History--20th century.
Machine-tool industry--Greece--History--19th century.
Machine-tool industry--Greece--History--20th century.
Piraeus (Greece)--Social conditions--20th century.
Princeton subject headings:
Businesspeople--Greece--History--19th century.
Businesspeople--Greece--History--20th century.
Kouppas, Achilleas, 1852---Biography.
Labor--Greece--Piraeus--History--20th century.
Machine-tool industry--Greece--History--19th century.
Machine-tool industry--Greece--History--20th century.
Piraeus (Greece)--Social history--20th century.