Columbia subject headings:
Blanc, Mont (France and Italy)--Pictorial works--Exhibitions.
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879--Exhibitions.
Harvard subject headings:
Blanc, Mont (France and Italy) in art--Exhibitions.
Blanc, Mont (France and Italy)--Pictorial works--Exhibitions.
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879--Contributions in geology--Exhibitions.
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879--Exhibitions.
Princeton subject headings:
Blanc, Mont (France and Italy)--In art--Exhibitions.
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879--Exhibitions.