VIDEO CASE STUDY 2

http://www.britannica.com/EBchecked/media/68263/The-Danube-River-links-the-countries-of-the-Balkan-Peninsulahttp://www.britannica.com/EBchecked/media/68263/The-Danube-River-links-the-countries-of-the-Balkan-Peninsulae-seven-continents