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 					Jeremy Siek, Lie-Quan Lee and Andrew Lumsdaine, <i>The Boost Graph Library</i>. 
 					Addison-Wesley, 2002. ISBN 0-201-72914-8. <a href="http://www.awl.com/cseng/titles/0-201-72914-8">
 						www.awl.com/cseng/titles/0-201-72914-8</a>
-					<P>A sample is chapter available at: <A href="http://tinyurl.com/24666">tinyurl.com/24666</A></P>
+					<P>A sample chapter is available at: <A href="http://tinyurl.com/24666">tinyurl.com/24666</A></P>
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