Columbia subject headings:
Ghosts--France--History--19th century--Congresses.
Haunted places--France--History--19th century--Congresses.
Occultism--France--History--19th century--Congresses.
Harvard subject headings:
Apparitions--France--History--19th century.
Ghosts--France--History--19th century.
Haunted places--France--History--19th century.
Haunted places--France--History.
Princeton subject headings: