@book{UBHD-1056319, author={Bašīr, Muḥammad ʿUmar}, title={The Southern Sudan}, subtitle={background to conflict}, edition={2. impr.}, publisher={Khartoum Univ. Pr.}, address={Khartoum}, year={1970}, pages={XIII, 192 S.}, language={eng}, library={UB [Signatur: 77 A 559]}, }