📊Federal Statistical Office (Destatis)
Press releases – 137,700 Germans studied abroad in 2015 – Federal Statistical Office (Destatis)
https://www.destatis.de/EN/PressServices/Press/pr/2018/03/PE18_081_213.html
Press releases – Accommodation in internal tourism in January 2018: 5% more overnight stays – Federal Statistical Office (Destatis)
https://www.destatis.de/EN/PressServices/Press/pr/2018/03/PE18_082_45213.html