Columbia subject headings:
Art nouveau--Exhibitions.
Guimard, Hector, 1867-1942--Exhibitions.
Horta, Victor, baron, 1861-1947--Exhibitions.
Velde, Henry van de, 1863-1957--Exhibitions.
Harvard subject headings:
Art nouveau--Exhibitions
Guimard, Hector, 1867-1942--Exhibitions.
Horta, Victor, baron, 1861-1947--Exhibitions.
Velde, Henry van de, 1863-1957--Exhibitions.
Princeton subject headings: