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Copyright 2003 Machtelt Garrels.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with the Invariant Sections being the “Copyright information” and “Feedback” sections, with no Front-Cover Texts and no Back-Cover Texts. A copy of the license is included in Appendix C, GNU Free Documentation License.

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