Columbia subject headings:
Architecture, Domestic--France--Opale Coast.
Resort architecture--France--Opale Coast.
Seaside architecture--France--Opale Coast.
Harvard subject headings:
Architecture, Domestic--France--History--1900-1945.
Resort architecture--France--Opale Coast--History.
Seaside architecture--France--Opale Coast.
Princeton subject headings:
Architecture, Domestic--France--Opale Coast.
Resort architecture--France--Opale Coast.
Seaside architecture--France--Opale Coast.