River basin development : policies and planning:proceedings of the United Nations Interregional Seminar on "River Basin and Interbasin Development" convened from 16 to 26 September 1975 in Budapest, in co-operation with the United Nations Development Programme and the National Water Authority of Hungary.
- New York : [s.n], 1976.
- (United Nations. Natural resources : water series ; no. 6). .