USGS IMAP 2015: Geologic map of the Bach region of Mercury
By Planetary Geologic Mapping
1990 (approx.)

Detailed Description
USGS IMAP 2015: Geologic map of the Bach region of Mercury
By R. G. Strom, M. C. Malin, and M. A. Leake
Map and associated documents available from the USGS Publications Warehouse: https://doi.org/10.3133/i2015
Sources/Usage
Public Domain.