"id","author_first1","author_last1","title","year","publication","place","keyword0","keyword1","keyword2","keyword3","type" "1881","Hans","Gebhardt","Entwicklungsimpulse durch Verkehrserschließung. Wirtschafts- und sozialgeographische Auswirkungen des jungen Infrastrukturausbaus in der Arabischen Republik Jemen","1987","Jemen-Studien Band 6","Wiesbaden","Change","Maps","Markets","Weekly","report"