http://dbpedia.org/resource/History_of_geography +
, http://dbpedia.org/resource/Rus%27_people +
, http://dbpedia.org/resource/Volga_Bulgaria +
, http://dbpedia.org/resource/Ahmad_ibn_Fadlan +
, http://dbpedia.org/resource/History_of_slavery +
, http://dbpedia.org/resource/Barsils +
, http://dbpedia.org/resource/Slavery_in_medieval_Europe +
, http://dbpedia.org/resource/List_of_Arabic_encyclopedias +
, http://dbpedia.org/resource/Srivijaya +
, http://dbpedia.org/resource/Alania +
, http://dbpedia.org/resource/Jankent +
, http://dbpedia.org/resource/Swedish_slave_trade +
, http://dbpedia.org/resource/Ibn_Hawqal +
, http://dbpedia.org/resource/History_of_encyclopedias +
, http://dbpedia.org/resource/Istakhri +
, http://dbpedia.org/resource/List_of_geographers +
, http://dbpedia.org/resource/Sanaa +
, http://dbpedia.org/resource/Sawad +
, http://dbpedia.org/resource/Khurasan_Road +
, http://dbpedia.org/resource/List_of_historians +
, http://dbpedia.org/resource/Al-Masudi +
, http://dbpedia.org/resource/Ibn_al-Athir +
, http://dbpedia.org/resource/Bashkirs +
, http://dbpedia.org/resource/An_Numaniyah +
, http://dbpedia.org/resource/Volga_trade_route +
, http://dbpedia.org/resource/Persian_Gulf +
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