Columbia subject headings:
Marble sculpture--20th century--Catalogs.
Sculpture, Abstract--Catalogs.
Harvard subject headings:
Marble--Italy--Apuan Alps.
Marble--Italy--Versilia Plain.
Outdoor sculpture--20th century.
Outdoor sculpture--21st century.
Sculpture, Abstract--20th century.
Sculpture, Abstract--21st century.
Princeton subject headings:
Large-scale sculpture--20th century.
Large-scale sculpture--21st century.
Marble sculpture--20th century.
Marble sculpture--21st century.
Outdoor sculpture.
Sculpture, Abstract.