Copyright Michael H. Birnbaum, 1998, all rights reserved. This program may be used freely for educational
and other noncommercial scholarly uses. You may copy and modify this program, as long as you copy this
copyright notice. If you do use it, please cite it in works that benefitted from
its use. Software is "as is," no guarantees or warranties can be made.
This material is based upon work supported by the National Science Foundation under Grant No.
SBR-9410572. Any opinions,
findings, and conclusions or recommendations expressed in this material are those of the author and do not
reflect the views of the National Science Foundation.
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