Columbia subject headings:
Fortress of Louisbourg National Historic Site (N.S.)--History.
Historic preservation--Nova Scotia--Louisbourg.
Historic sites--Conservation and restoration--Nova Scotia--Louisbourg.
Harvard subject headings:
Fortress of Louisbourg National Historic Site (N.S.)--History.
Historic preservation--Nova Scotia--Louisbourg.
Historic sites--Conservation and restoration--Nova Scotia--Louisbourg.
Princeton subject headings:
Fortress of Louisbourg National Historic Site (N.S.)--History.
Historic preservation--Nova Scotia--Louisbourg.
Historic sites--Nova Scotia--Louisbourg--Conservation and restoration.