[texhax] Something's wrong--perhaps a missing \item

[burlen]

I am compiling a document and I get this error message:

./astronum2007.bbl:8:Something's wrong--perhaps a missing \item. 
\bibitem[Balsara(2001)]{Balsara2001}

I have looked at the .bbl file referenced but can't seem to figure what 
is wrong. I have included it below. I was working on this report a  
month or so ago and remember figuring out that if I deleted some of the 
lines in .bbl and rearranged I could get it to work, but now I can't 
figure out exactly what I had done to make it work can anyone help??

\begin{thebibliography}{7}
\providecommand{\natexlab}[1]{#1}
\providecommand{\url}[1]{\texttt{#1}}
\expandafter\ifx\csname urlstyle\endcsname\relax
  \providecommand{\doi}[1]{doi: #1}\else
  \providecommand{\doi}{doi: \begingroup \urlstyle{rm}\Url}\fi

\bibitem[Balsara(2001)]{Balsara2001}
D.~Balsara.
\newblock Divergence free adaptive mesh refinement for magnetohydrodynamics.
\newblock \emph{Journal of Computational Physics}, 174:\penalty0 614--648,
  2001.

\bibitem[Berger and Collela(1989)]{Berger1989}
M.~J. Berger and P.~Collela.
\newblock Local adaptive mesh refinement for shock hydrodynamics.
\newblock \emph{Journal of Computational Physics}, 82:\penalty0 64--84, 
1989.

\bibitem[Evans and Hawley(1988)]{Evans1988}
C.~Evans and J.~Hawley.
\newblock Simulation of magnetohydrodynamic flows: A constrained transport
  method.
\newblock \emph{The Astrophysical Journal}, 332:\penalty0 659--667, 1988.