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2. Identification of O2;Calvin;Bull. Am. Astron. Soc.,1994
3. Transmission measurements of condensed O2;Calvin;Bull. Am. Astron. Soc.,1995
4. Spectra of the icy Galilean satellites from 0.2- to 5-μm: A compilation, new observations and a recent summary;Calvin;J. Geophys. Res.,1995
5. O2;Calvin;Geophys. Res. Lett.,1996