Columbia subject headings:
France--History--To 987.
Franks--France--History.
Military history, Medieval.
Paris (France)--History--Siege, 885-887.
Vikings--France--History.
Harvard subject headings:
France--History--To 987.
Franks--France.
Paris (France)--History--Siege, 885-887.
Vikings--France--Paris.
Vikings--France.
Princeton subject headings:
France--History--To 987.
Franks--France--History.
Paris (France)--History--Siege, 885-887.
Vikings--France--History.