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Electric propulsion in Europe at the beginning of the nineties : Rep.presented at AIAA/DGLR/JSASS 21st international electric propulsion conf.,July 18-20,1990,Orlando,Fl. / H.W.Loeb,D.G.Fearn,A.R.Martin и др., 1990. - 16 p. - Текст : непосредственный.