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Hexagonal (or Trigonal) System (view source)
Revision as of 14:07, May 25, 2007
, 14:07, May 25, 2007cat
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)
*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)
[[category:geometry]]
[[category:geometry]]
[[category:geology]]