Washington D.C : carte interactive de 127 000 bâtiments (histoire)
IHN-AMU D.C.'s New Historic Building Map Is Something to See https://t.co/UFg2SehOBP
— An Keqiang (@ankeqiang) December 30, 2016
IHN-AMU D.C.'s New Historic Building Map Is Something to See https://t.co/UFg2SehOBP
— An Keqiang (@ankeqiang) December 30, 2016