1. National Minerals Information Center, U.S. Geological Survey, Reston, VA, USA.
2. Natural Systems Analysts Inc., Winter Park, FL, USA.
3. U.S. Defense Logistics Agency, Fort Belvoir, VA, USA.
4. Oak Ridge National Laboratory, Oak Ridge, TN, USA.
5. Office of Science and Technology Policy, Executive Office of the President of the United States, Washington, DC, USA.