published on: 2016-12-20 02:09:16
Merry Christmas
polworld.tumblr.com/post/154661902529/
Mappa mondiale del coefficiente di Gini che misura la diseguaglianza
polworld.tumblr.com/post/154710264394/
Bowling Columbine
polworld.tumblr.com/post/154806559059/