Columbia subject headings:
Harvard subject headings:
Canary Islands--Commerce--History--Congresses.
Canary Islands--History--Congresses.
Canary Islands--Relations--Latin America--Congresses.
Latin America--Relations--Canary Islands--Congresses.
Princeton subject headings:
America--Relations--Canary Islands--Congresses.
Canary Islands--History--Congresses.
Canary Islands--Relations--America--Congresses.
Las Palmas (Canary Islands)--History--Congresses.