Columbia subject headings:
Harvard subject headings:
Amateur theater--Portugal--Porto--History--20th century.
Experimental theater--Portugal--Porto--History--20th century.
Porto (Portugal)--Intellectual life--20th century.
Princeton subject headings:
Amateur theater--Portugal--Porto--History--20th century.
Experimental theater--Portugal--Porto--History--20th century.
Porto (Portugal)--Intellectual life--20th century.