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\hypersetup{pdftitle={Manual dos Comandos do Gretl},
            pdfsubject={GNU Regression, Econometrics and Time Series Library},
            pdfauthor={Allin Cottrell},
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{\large \sffamily
Allin Cottrell\\
Department of Economics\\
Wake Forest University\\

\vspace{20pt}
Riccardo ``Jack'' Lucchetti\\
Dipartimento di Economia\\
Università Politecnica delle Marche\\

\vspace{20pt}

Hélio Guilherme\\
Tradução Portuguesa\\
\vspace{20pt}
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}

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\vspace*{2in}

Permission is granted to copy, distribute and/or modify this document
under the terms of the \emph{GNU Free Documentation License}, Version
1.1 or any later version published by the Free Software Foundation
(see \url{http://www.gnu.org/licenses/fdl.html}).\\

\vspace{20pt}
A cópia, distribuição e/ou modificação deste documento é permitida de
acordo com os termos da \emph{Licença de Documentação Livre GNU},
Versão 1.1 ou qualquer versão posterior publicada pela Free Software
Foundation (ver em \url{http://www.gnu.org/licenses/fdl.html}).

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