@book{UBHD-1070105, author={Gray, Richard}, title={A history of the southern Sudan 1839 - 1889}, publisher={Oxford Univ. Pr.}, address={London}, year={1961}, pages={VIII, 219 S.}, language={eng}, library={UB [Signatur: 62 A 277] ; GE [Signatur: Kt 140]}, }