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-    <h4><a href="Appendix%20A%20-%20An%20Introduction%20to%20Preprocessor%20Metaprogramming.html"
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         target="_top">Introduction</a></h4>
     <h4><a href="topics.html">Topics</a></h4>
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       may be used as a standalone library. </div>
     <div> An excerpt from <i>C++ Template Metaprogramming: Concepts, Tools, and
         Techniques from Boost and Beyond</i> by Dave Abrahams and Aleksey
-      Gurtovoy has been made <a href="Appendix%20A%20-%20An%20Introduction%20to%20Preprocessor%20Metaprogramming.html"
+      Gurtovoy has been made <a href="AppendixA-AnIntroductiontoPreprocessorMetaprogramming.html"
         target="_top"><font color="blue"><b><u><i>available</i></u></b></font></a>.
       This excerpt contains a basic introduction to the Preprocessor library and
       preprocessor metaprogramming which may help users new to the library and
