Pyroxene Group from San Juan Mountains, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Holmes, Richard Walker, Kennedy, Marrianna B. (1983) Mines and Minerals of the Great American Rift (Colorado-New Mexico). Van Nostrand Reinhold Co., New York. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |