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\begin{titlepage}
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  \begin{center}
    \Huge
    \textbf{R: A Language and Environment for Statistical Computing}

    \LARGE
    \par\vspace*{6\medskipamount}
    \textbf{Reference Index}

    \par\vspace*{6\medskipamount}
    The \R\ Core Team

    \large
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    Version \input{version}
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  \vfill
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  \noindent
  Copyright ({\copyright}) 1999--2012 R Foundation for Statistical Computing.

  \noindent
  Permission is granted to make and distribute verbatim copies of this
  manual provided the copyright notice and this permission notice are
  preserved on all copies.

  \noindent
  Permission is granted to copy and distribute modified versions of this
  manual under the conditions for verbatim copying, provided that the
  entire resulting derived work is distributed under the terms of a
  permission notice identical to this one.

  \noindent
  Permission is granted to copy and distribute translations of this manual
  into another language, under the above conditions for modified versions,
  except that this permission notice may be stated in a translation
  approved by the R Core Team.

  \par\bigskip\noindent
  R is free software and comes with ABSOLUTELY NO WARRANTY.  You are
  welcome to redistribute it under the terms of the GNU General Public
  License.  For more information about these matters, see
  \textsf{https://www.gnu.org/copyleft/gpl.html}.
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