Sources
- King, John S.; David H. Scott (1990). "Geologic Map Of The Beethoven (H-7) Quadrangle Of Mercury". http://astrogeology.usgs.gov/Projects/PlanetaryMapping/DIGGEOL/mercury/h7/h7.pdf. Prepared for the National Aeronautics and Space Administration by the U.S. Department of the Interior, U.S. Geological Survey. Published in hardcopy as USGS Miscellaneous Investigations Series Map I–2048, as part of the Atlas of Mercury, 1:5,000,000 Geologic Series. Hardcopy is available for sale from U.S. Geological Survey, Information Services, Box 25286, Federal Center, Denver, CO 80225
Read more about this topic: Beethoven Quadrangle
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