History
የኢትዮጵያ ኦርቶዶክስ ተዋሕዶ ቤተ ክርስቲያን ታሪክ
The history of the Ethiopian Orthodox Tewahdo Chur...
Gregorios (Aba, archbishop of Shewa, MA) - Addis Ababa (Ethiopia),
1993
የቤተ ክርስትያን ታሪክ በዓለም መድረክ
The history of the church in the world
Gregorios (Aba, archbishop of Shewa, MA) - Addis Ababa (Ethiopia),
1975