North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Propulsion and Energetics Panel. Symposium (81st : 1993 : Fiuggi, Italy)
sponsored by the U.S. Department of Energy, Energy Efficiency and Renewable Energy, Weatherization and Intergovernmental Program ; prepared by the National Renewable Energy Laboratory
North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Propulsion and Energetics Panel. Specialists ́Meeting (72nd : 1988 : Bath, England)