Columbia subject headings:
Hager International AG--Exhibitions.
Hager, Guido--Exhibitions.
Landscape architecture--Exhibitions.
Harvard subject headings:
Architecture, Modern--20th century--Exhibitions
Architecture, Modern--21st century--Exhibitions
Hager Landschaftsarchitektur AG.
Hager, Guido--Exhibitions.
Hager, Guido.
Historic gardens--Conservation and restoration--Europe--Exhibitions.
Landscape architecture
Landscape architecture--Europe--History--Exhibitions.
Landscape architecture--Exhibitions.
Urban landscape architecture--Exhibitions.
Princeton subject headings:
Hager International AG.
Hager, Guido.
Landscape architecture.