# Difficulty of bbl file

I am using Texmaker for this, and I have put in the following in the .bbl file,

\begin{thebibliography}{}
@Article{Johnson,
author = {Edgar G. Johnson and Alfred O. Nier},
title = {Angular Aberrations in Sector Shaped Electromagnetic Lenses for Focusing Beams of
Charged Particles},
journal = {Physical Review},
year = {1953},
volume = {91},
number = {1},
}
\end{thebibliography}


And here is the code for the tex file

\documentclass[11pt,a4paper]{report}
\usepackage[margin=1in]{geometry}
\usepackage{titlesec}
\usepackage{amssymb}
\usepackage{filecontents}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}

....

\bibliographystyle{plain}
\bibliography{mp3.bbl}

\end{document}


but the outcome from the pdf looks like this.

@ArticleJohnson, author = Edgar G. Johnson and Alfred O. Nier, title = Angular Aberrations in Sector Shaped Electromagnetic Lenses for Focusing Beams of Charged Particles, journal = Physical Review, year = 1953, volume = 91, number = 1, 12

• I have re-tagged the question: It is not really about biblatex, you are trying to use standard BibTeX, and TeXmaker is not the source of the problem. – moewe Nov 21 '15 at 7:50
• Please, instead of adding "solved" to the question title, you should accept the useful answer by clicking the green tick below the answer score. – yo' Nov 21 '15 at 17:45

You mixed several things here.

A bbl is something else, you need with the given structure a bib file.

With bibtex you can run a bib file and get the result in a bbl file, depending on the used \cite commands in your tex file ...

To get a bibliography you have to cite at last one or more entrys. If you want to get all bib entrys cited (good for testing the bib file) just use command \nocite{*}. To cite a special entry, for example your article Johnson, use \cite{Johnson}.

See the compiling code:

\RequirePackage{filecontents}
\begin{filecontents}{\jobname.bib}
@Article{Johnson,
author = {Edgar G. Johnson and Alfred O. Nier},
title = {Angular Aberrations in Sector Shaped Electromagnetic Lenses for Focusing Beams of
Charged Particles},
journal = {Physical Review},
year = {1953},
volume = {91},
number = {1},
}
\end{filecontents}

\documentclass[11pt,a4paper]{report}
%\usepackage[margin=1in]{geometry}
%\usepackage{titlesec}
%\usepackage{amssymb}

%\usepackage{tikz}
%\usetikzlibrary{shapes,arrows}

\begin{document}

\nocite{*} % <===================== cites all entries
\cite{Johnson} % <=============== cites entry Johnson
\bibliographystyle{plain}
\bibliography{\jobname}% <========= calls above bib file

\end{document}


and the result:

I commented all not relevant packages you called in your code. You tagged with biblatex but you didn't call it in your code. Do you want to use biblatex? Then the code had to be changed a little bit ...