1. Long-term changes in composition of solar particles implanted in extraterrestrial materials;Kerridge,1991
2. Long time variations in solar wind properties: Possible causes versus observations;Geiss,1991
3. Lunar ion energy spectra and surface potential;Manka;Geochim. Cosmochim. Acta,1973
4. R.H. Manka, J.W. Freeman, F.C. Michel, R.C. Elphic, D.J. McComas, R.R. Hodges, J.L. Burch, and R.E. Johnson, Lunar atmosphere, plasma and fields, this issue.
5. Y. Langevin, Remote sensing of the lunar surface from a lunar polar orbiter, this issue.