13.		Proceedings of the United Nations conference on new sources of energy
14.		New sources of energy and energy development.
15.		Sources nouvelles d'énergie et production d'énergie
16.		United Nations conference on new sources of energy: solar energy, wind power and geothermal energy
17.		United Nations conference on new sources of energy : solar energy, wind power and gerthermal energy
18.		United Nations conference on new sources of energy: solar energy, wind power and gerthermal energy
19.		United Nations conference on new sources of energy: solar energy, wind power and geothermal energy
20.		United Nations conference on new sources of energy: solar energy, wind power and geothermal energy
21.		United Nation conference on new sources of energy: solar energy, wind power and geothermal energy
22.		United Nations conference on new sources of energy: solar energy, wind power and geothermal energy
23.		United Nations conference on new sources of energy: solar energy, wind power and geothermal energy
24.		United Nations conference on new sources of energy: solar energy, wind power and geothermal energy