Columbia subject headings:
Harvard subject headings:
Portuguese literature--20th century--History and criticism.
Portuguese literature--21st century--History and criticism.
Portuguese literature--Portugal--Trás-os-Montes e Alto Douro--History and criticism.
Princeton subject headings:
Portuguese literature--20th century--History and criticism.
Portuguese literature--21st century--History and criticism.
Portuguese literature--Portugal--Trás-os-Montes e Alto Douro--History and criticism.