Columbia subject headings:
Harvard subject headings:
Aragon (Spain)--Social life and customs--Congresses.
Folklore--Spain--Aragon--Congresses.
Spanish language--Spain--Aragon--Congresses.
Spanish literature--Spain--Aragon--History and criticism--Congresses.
Princeton subject headings:
Aragon (Spain)--Social life and customs--Congresses.
Folk literature--Spain--Aragon--Congresses.
Folklore--Spain--Aragon--Congresses.