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"The United States has filed a case at the World Trade Organization against China's restrictions on rare-earth exports, officials said Tuesday."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Business_News/2012/03/13/US-presses-China-on-rare-earth-quotas/UPI-15231331638213/?st_rec=79381332360379>