Energy conservation : technology, economics, and policy : proceedings of the symposium with international participation on "energy conservation and international cooperation," March 24-26, 1981, Bucharest, Romania / edited by Gheorghe M. Preda ; [translated by Emanuel-Eliade Merealbe and Mihaela Ionescu ; drawings by Mariana Chercea and Gabriela Mihăilescu].
Energy conservation : technology, economics, and policy : proceedings of the symposium with international participation on "energy conservation and international cooperation," March 24-26, 1981, Bucharest, Romania / edited by Gheorghe M. Preda ; [translated by Emanuel-Eliade Merealbe and Mihaela Ionescu ; drawings by Mariana Chercea and Gabriela Mihăilescu].