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Copyright 1998

Board of Regents of the University of Wisconsin System.

These materials may be copied freely by individuals or libraries for personal use, research, teaching (including distribution to classes), or any "fair use" as defined by copyright laws. Please include this statement with any copies you make. The materials may be linked to freely in Internet editions of all kinds, including for-profit works.

Anyone interested in any other use of this material is expected to contact the University of Wisconsin-Madison General Library System for permission.