Columbia subject headings:
Harvard subject headings:
Macau (China : Special Administrative Region)--History--20th century.
Macau (China : Special Administrative Region)--Relations--Portugal.
Portugal--History--20th century.
Portugal--Relations--China--Macau (Special Administrative Region)
Princeton subject headings:
Macau (China : Special Administrative Region)--History--20th century.
Macau (China : Special Administrative Region)--Relations--Portugal.
Portugal--History--20th century.
Portugal--Relations--Macau (China : Special Administration Region).