Columbia subject headings:
Expo (International Exhibitions Bureau) (2015 : Milan, Italy)
Expo (International Exhibitions Bureau) (2015 : Milan, Italy)--Buildings.
Food security.
Sustainable development.
Harvard subject headings:
Expo (International Exhibitions Bureau) (2015 : Milan, Italy)
Expo (International Exhibitions Bureau) (2015 : Milan, Italy)--Buildings.
Food security.
Sustainable development
Princeton subject headings:
Expo (International Exhibitions Bureau) (2015 : Milan, Italy)
Expo (International Exhibitions Bureau) (2015 : Milan, Italy)--Buildings.
Food security.
Sustainable development.