//-->
Assistance to the drought-stricken areas of Ethiopia : report of the Secretary-General
(1974)
Development, drought, and famine in the Awash Valley of Ethiopia
Kloos, Helmut, (1982)
Medium-term rehabilitation programme for settled agriculture in drought stricken provinces of Ethiopia
Ground-water resources exploration and its significance for the development of the national economy of the German Democratic Republic
Glander, H., (1977)
Main trends in treatment of municipal and industrial sewage in the USSR
Schubert, Sergei Aleksandrovich, (1977)
Water development and conservation : ways and means
Vladisavljević, Ž., (1976)