McEwan, D. (1988). A Catholic Sudan: Dream, mission, reality ; a study of the Roman Catholic Mission to Central Africa and its protection by the Hapsburg Empire from 1846 to 1900 (1914) as revealed in the correspondence of the Imperial and Royal Austro-Hungarian Consulate Khartoum. Roma: Stabilimento Tipografico Julia.

McEwan, Dorothea. A Catholic Sudan: Dream, Mission, Reality ; a Study of the Roman Catholic Mission to Central Africa and Its Protection By the Hapsburg Empire From 1846 to 1900 (1914) As Revealed in the Correspondence of the Imperial and Royal Austro-Hungarian Consulate Khartoum. Roma: Stabilimento Tipografico Julia, 1988.

McEwan, Dorothea. A Catholic Sudan: Dream, Mission, Reality ; a Study of the Roman Catholic Mission to Central Africa and Its Protection By the Hapsburg Empire From 1846 to 1900 (1914) As Revealed in the Correspondence of the Imperial and Royal Austro-Hungarian Consulate Khartoum. Roma: Stabilimento Tipografico Julia, 1988.