Resonance ionization spectroscopy 1990 : proceedings of the Fifth International Symposium on Resonance Ionization Spectroscopy and Its Applications, held at the Congress Centre Villa Ponti, Varese, Italy, 16-21 September 1990 - International Symposium on Resonance Ionization Spectroscopy and its Applications; Parks, J. E. (James E.); Omenetto, Nicolò (Institute of Physics conference series, 1991)