1874
MARNO, Ernst.
1901
Great Britain. War Office. Intelligence Division.
1867
Schepperlen, Friedrich
1:2m
1868
Heuglin, Theodor von
1:3m
1683
Jobus Ludolphus 1624-1704; Christianus Ludolfus
1:2m
1890
JUNKER, Wilhelm.
1955
Sudan. Maṣlaḥat al-Misāḥah.
1954
Khartoum : Sudan Survey Dept.
1955
Sudan. Maṣlaḥat al-Misāḥah.
1951
Khartoum : Sudan Survey Dept.