International Symposium on Discharge and Electrical Insulation in Vacuum.International Symposium on Discharge and Electrical Insulation in Vacuum (11th : 1984 : Berlin):Proceedings.V.1.GDR,1984.
International Symposium on Discharge and Electrical Insulation in Vacuum.International Symposium on Discharge and Electrical Insulation in Vacuum (11th : 1984 : Berlin):Proceedings.V.2.GDR,1984.