Columbia subject headings:
Industrial management--Netherlands--History--20th century.
Netherlands--Economic conditions--1918-1945.
Netherlands--Social conditions.
Netherlands. Postchèque- en Girodienst.
Netherlands. Staatsbedrijf der Posterijen, Telegrafie en Telefonie.
Harvard subject headings:
Industrial management--Netherlands--History--20th century.
Netherlands--Economic conditions--1918-1945.
Netherlands--Social conditions.
Netherlands. Postchèque- en Girodienst.
Netherlands. Staatsbedrijf der Posterijen, Telegrafie en Telefonie.
Princeton subject headings: