EXPERIMENTS ON ELECTRON IMPACT EXCITATION AND DIELECTRONIC RECOMBINATION AT HARVARD-SMITHSONIAN L.D. GARDNER, J.L. KOHL, D.W. SAVIN et A.R. YOUNG J. Phys. Colloques, 50 C1 (1989) C1-405-C1-409 DOI: 10.1051/jphyscol:1989148