Mars Apparition of 1992-93: CCD Imaging from HST and Ground-based Telescopes Martin, L. J. ; James, P. B. ; Clancy, R. T. ; Lee, S. W. ; Beish, J. D. ; Parker, D. C. Abstract Publication: AAS/Division for Planetary Sciences Meeting Abstracts #25 Pub Date: June 1993 Bibcode: 1993DPS....25.1106M