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http://minerals.usgs.gov/minerals/pubs/commodity/ - Statistics and information on the worldwide supply of, demand for, and flow of minerals and materials essential to the U.S. economy, the national security, and protection of the environment.
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http://www.tzmi.com/ - TZ Minerals International Pty Ltd (TZMI) is a Perth-based consulting firm, established in 1994, which specialises in the collection, analysis and distribution of data on the titanium minerals, zircon and TiO2 pigment industries.
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