Columbia subject headings:
Glass art--Finland--20th century--Exhibitions.
Wirkkala, Tapio, 1915-1985--Exhibitions.
Harvard subject headings:
Glass art--Finland--20th century--Exhibitions.
Wirkkala, Tapio, 1915-1985--Exhibitions.
Princeton subject headings:
Glass art--Finland--20th century--Exhibitions.
Wirkkala, Tapio, 1915-1985--Exhibitions.