Columbia subject headings:
Castillo de Morella (Morella, Spain)
Castles--Spain--Morella.
Castles--Spain--Ports de Morella Region.
Fortification--Spain--Morella.
Fortification--Spain--Ports de Morella Region.
Morella (Spain)--Buildings, structures, etc.
Harvard subject headings:
Castillo de Morella (Morella, Spain)
Castles--Spain--Morella.
Castles--Spain--Ports de Morella Region.
Fortification--Spain--Morella.
Fortification--Spain--Ports de Morella Region.
Morella (Spain)--Buildings, structures, etc.
Princeton subject headings:
Castillo de Morella (Morella, Spain)
Castles--Spain--Morella.
Castles--Spain--Ports de Morella Region.
Fortification--Spain--Morella.
Fortification--Spain--Ports de Morella Region.
Morella (Spain)--Buildings, structures, etc.