Columbia subject headings:
Biscay, Bay of (France and Spain)--History.
Harbors--Biscay, Bay of (France and Spain)
Harvard subject headings:
Biscay, Bay of (France and Spain)--Navigation--History.
Cities and towns--Bay of Biscay (France and Spain)--History.
Harbors--Biscay, Bay of (France and Spain)--History.
Princeton subject headings:
Biscay, Bay of (France and Spain)--Navigation--History.
Cities and towns--France--Bay of Biscay (France and Spain)--History.
Harbors--France--Biscay, Bay of (France and Spain)--History.