EFFECT OF GAS PURITY ON THE CURRENT OF A NON-SELF SUSTAINED DISCHARGE IN NITROGEN G.B. Lopantseva, A.F. Pal, A.F. Perevoznov, I.G. Persiantsev et A.N. Starostin J. Phys. Colloques, 40 C7 (1979) C7-499-C7-500 DOI: 10.1051/jphyscol:19797242