Perspectives of renewable energy resources utilization in Karelian fuel-energy balance : proceedings of the first International Seminar : Volume 1, 4. - 7. April, 1993, Petrozavodsk, Russia
Perspectives of renewabl[e] energy resources utilization in Karelian fuel-energy balance : proceedings of the first International Seminar : Volume 2, 4. - 7. April, 1993, Petrozavodsk, Russia
Perspectives of renewable energy resources utilization in Karelian fuel-energy balance : proceedings of the first International Seminar : Volume 1, 4. - 7. April, 1993, Petrozavodsk, Russia
Perspectives of renewable energy resources utilization in Karelian fuel-energy balance : proceedings of the first International Seminar : Volume 1, 4. - 7. April, 1993, Petrozavodsk, Russia
Perspectives of renewable energy resources utilization in Karelian fuel-energy balance : proceedings of the first International Seminar : Volume 1, 4. - 7. April, 1993, Petrozavodsk, Russia
Perspectives of renewabl[e] energy resources utilization in Karelian fuel-energy balance : proceedings of the first International Seminar : Volume 2, 4. - 7. April, 1993, Petrozavodsk, Russia
Perspectives of renewabl[e] energy resources utilization in Karelian fuel-energy balance : proceedings of the first International Seminar : Volume 2, 4. - 7. April, 1993, Petrozavodsk, Russia