Columbia subject headings:
Nadar, Félix, 1820-1910.
Underground areas--France--Paris.
Harvard subject headings:
Catacombs--France--Paris--Pictorial works.
Nadar, Félix, 1820-1910--Exhibitions
Sewerage--France--Paris--Pictorial works.
Underground areas--France--Paris--Exhibitions.
Underground areas--France--Paris--Pictorial works.
Princeton subject headings:
Catacombs--France--Paris--Pictorial works.
Sewerage--France--Paris--Pictorial works.
Underground areas--France--Paris--Pictorial works.