https://portal.dnb.de/opac.htm?method=simpleSearch&query=130430137

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SBB StaBiKat - results/shortlist

http://stabikat.sbb.spk-berlin.de/DB=1/SET=3/TTL=19/MAT=/NOMAT=T/REL?PPN=133427722

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Mideast File - Google Books

http://books.google.de/books?id=J1xtAAAAMAAJ&q=%22sadeh+prize%22&dq=%22sadeh+prize%22&hl=de&sa=X&ei=nq1vU7m4MbCnyAPOiYHABQ&ved=0

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"Isolde Riede" - Google-Suche

http://www.google.de/search?num=100&hl=de&safe=off&tbm=bks&q=+%22Isolde+Riede%22&oq=+%22Isolde+Riede%22&gs_l=serp.12...264119.26

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The Southern Sudan in Historical Perspective - Robert O. Collins - Google Books

https://books.google.de/books?id=9dDxtIVy-24C

Robert O. Collins is one of the most prolific authors on Africa, the Sudan, and the Nile. The Southern Sudan in Historical Perspective, based on a seriesof lectures he gave in 1973 to the Department of Middle Eastern and AfricanHistory and the Shiloah…