Desde FB > http://www.fastcodesign.com/1671961/mapping-happiness-in-american-cities-using-twitter Las ciudades yanquis mas felices según Twitter

http://www.fastcodesign.com/1671961/mapping-happiness-in-american-cities-using-twitter via http://www.fastcodesign.com/1671961/mapping-happiness-in-american-cities-using-twitter#3