\begin{thebibliography}{1}

\bibitem{MSHA98}
Mine Safety Health~Administration (MSHA).
\newblock Injury tables (1996-1998).
\newblock MSHA, Denver CO.

\bibitem{staley92:cscatsim}
B.~G. Staley.
\newblock Culture shock-changing attitudes to safety in mines.
\newblock In {\em Proc. of Safety, Hygene and Health in Mining}, pages
  263--273, Harrogate, England, 1992. Institution of Mining Engineers.

\bibitem{openinventor}
Josie Werecke.
\newblock {\em The Inventor Mentor}.
\newblock Addison Wesley, Reading, MA, 1994.

\end{thebibliography}