Albedo Anomalies on Ganymede: Implications for Surface Compositions and Processes Polk, K. ; Hawke, B. R. ; Granahan, J. C. ; Fanale, F. P. ; Cloutis, E. A. Abstract Publication: AAS/Division for Planetary Sciences Meeting Abstracts #26 Pub Date: June 1994 Bibcode: 1994DPS....26.2613P