Columbia subject headings:
Harvard subject headings:
Human ecology--Italy--Tuscany.
Tuscany (Italy)--Environmental conditions.
Princeton subject headings:
Conservation of natural resources--Italy--Tuscany.
Hot springs--Italy--Siena Region.
Siena Region (Italy)--Economic conditions.
Tuscany (Italy)--Economic conditions.
Tuscany (Italy)--Environmental conditions.
Tuscany (Italy)--Social conditions.