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\begin{frame}{Material}
  \centering
  \includegraphics[height=.65\textheight]{images/linz-cover.jpg}\\[1ex]
  \centerline{\alert{Peter Linz}}
  \centerline{\structure{An Introduction to Formal Languages and Automata} (5th edition)}
  \centerline{{Jones and Bartlett}}
\end{frame}