Columbia subject headings:
Harvard subject headings:
Industrialization--Greece--Patra--History--20th century.
Industrialization--Social aspects--Greece--Patra.
Patra (Greece)--Economic conditions--20th century.
Refugees--Greece--Patra.
Princeton subject headings:
Industrialization--Greece--Patrai--History--20th century.
Industrialization--Social aspects--Greece--Patrai.
Patra (Greece)--Economic conditions--20 century.
Refugees--Greece--Patrai--Social conditions.