Research data bank of development indicators : United Nations Vol. IV, notes on the indicators / United Nations United Nations. Statistical Papers. Statistics 311.2 UNR Issued by the Statistical Office of the United Nations. Continues: Energy balances ... and electricity profiles ... for selected developing countries and areas. Geneva : United Nations, 1977. 1977. 1977 Text Collection 195 p. : d Energy balances ... and electricity profiles ... for selected developing countries and areas