Reference 1: Area (km²), Population and Density (inh./km²).
Reference 2: Province of Arezzo, Metropolitan City of Florence, Province of Grosseto, Province of Livorno, Province of Lucca, Province of Massa and Carrara, Province of Pisa, Province of Pistoia, Province of Prato and Province of Siena.
Source: http://en.wikipedia.org/wiki/Tuscany
Reference 2: Province of Arezzo, Metropolitan City of Florence, Province of Grosseto, Province of Livorno, Province of Lucca, Province of Massa and Carrara, Province of Pisa, Province of Pistoia, Province of Prato and Province of Siena.
Source: http://en.wikipedia.org/wiki/Tuscany
