Columbia subject headings:
Ethiopia--Politics and government--1889-1974.
Ethiopia--Politics and government--1974-1991.
YaʼItyop̣yā ḥezbāwi ʼabyotāwi pārti--History.
Harvard subject headings:
Ethiopia--Politics and government--1889-1974.
Ethiopia--Politics and government--1974-
YaʼItyop̣yā ḥezbāwi ʼabyotāwi pārti--History.
Princeton subject headings:
Ethiopia--Politics and government--1889-1974.
Ethiopia--Politics and government--20th century.
Ethiopian People's Revolutionary Party--History.