Copyright, 1995, The University of California
                                The University of Chicago

          Portions of this material resulted from work developed under
          a U.S. Government contract and are subject to the following
          license: For a period of five years from March 30, 1993, the
          Government is granted for itself and others acting on its
          behalf a paid-up, nonexclusive, irrevocable worldwide
          license in this computer software to reproduce, prepare
          derivative works, and perform publicly and display publicly.
          Upon request of Licensee, and with DOE and Licensors
          approval, this period may be renewed for two additional five
          year periods.  Following the expiration of this period or
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          acting on its behalf, a paid-up, nonexclusive, irrevocable
          worldwide license in this computer software to reproduce,
          prepare derivative works, distribute copies to the public,
          perform publicly and display publicly, and to permit others
          to do so.  NEITHER THE UNITED STATES NOR THE UNITED
          STATES DEPARTMENT OF ENERGY, NOR ANY OF THEIR EMPLOYEES,
          MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LEGAL
          LIABILITY OR RESPONSIBILITY FOR THE ACCURACY, COMPLETENESS,
          OR USEFULNESS OF ANY INFORMATION, APPARATUS, PRODUCT, OR
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