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% file `eso-ex3.tex'; an example for import pages of another (pdf) document.
% This works only with `pdfTeX' (maybe `VTeX'?).
% Based on an article from Andreas Matthias <amat@kabsi.at> in d.c.t.t
%
% A much better solution is Andreas' package `pdfpages'.
%
% Rolf Niepraschk, 2015-07-14, Rolf.Niepraschk@gmx.de

\documentclass[a4paper]{article}
\usepackage[pdftex]{graphicx}%
% `pdftex.def' >= 2000/05/12 v0.02u and `pdftex' >= v0.14 are needed.
\usepackage{ifthen,calc,eso-pic}

\newcounter{thispdfpage}\newcounter{afterlastpdfpage}
\newcommand{\includepdfpages}[3]
{%
  \setcounter{thispdfpage}{#2}\setcounter{afterlastpdfpage}{#3+1}%
  \newpage
  \whiledo{\value{thispdfpage} < \value{afterlastpdfpage}}%
  {%
    \AddToShipoutPicture*
    {%
      \put(0,0){%
        \includegraphics[width=\paperwidth,height=\paperheight,%
                         keepaspectratio,page=\arabic{thispdfpage}]{#1}}%
    }
    \thispagestyle{empty}\mbox{}\newpage
    \stepcounter{thispdfpage}%
  }
}

\begin{document}

\section{First page of the main document}

% import pages 1 to 3 of an external document.
\includepdfpages{ltx3info.pdf}{1}{3}

\section{First page after the imported pages of the external document}

\end{document}