Abdullahi Yousuf was active in the leftist Union of Ethiopian Students in Europe, along with Haile Fida. During their student years Haile Fida and Abdullahi Yousuf made significant contributions to the development of Afaan Oromoo as a written language. During the early years of the Ethiopian Revolution, he was appointed head of the Provisional Office for Mass Organizational Affairs in Hararghe. As a POMOA leader, he disarmed Shoan Christian settlers and implemented land reform in Hararghe.
- Bulcha, Mekuria. Flight and Integration: Causes of Mass Exodus from Ethiopia and Problems of Integration in the Sudan. Uppsala: Scandinavian Institute of African Studies [Nordiska Afrikainstitutet], 1988. p. 66
- Clapham Christopher. Transformation and Continuity in Revolutionary Ethiopia. Cambridge: Cambridge University Press, 1988. p. 203, 216
- The Gulèlè Post. HISTORY OF OROMO WRITING and the Contribution of Dr. Mohammed Reshad