Home › Authors › R. J. L. Grard 👤 R. J. L. Grard 4 books Books by R. J. L. Grard Mercury, Mars and Saturn Mercury, Mars and Saturn 2006 Returns to Mercury Returns to Mercury 2001 Planetary magnetospheric physi Planetary magnetospheric physics 1991 Dynamic behaviour of the photo Dynamic behaviour of the photoelectron sheath 1970