\documentclass[pdftex,11pt,letterpaper]{report}
\usepackage[pdftex]{graphicx}
\usepackage{setspace}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{url}


\begin{document}
\bibliographystyle{plain}
\input{./titlepage.tex}

\input{./introduction.tex}

\input{./pvars.tex}

\end{document}
