\begin{overpic}[width=0.49\textwidth]{ade1900}
\put(1,74){\colorbox{white}{(\sublabel{ade1900}) \href{http://dream.misasa.okayama-u.ac.jp/?q=20120625093955-289-053}{ade1900}}}
%%(\subref{ade1900}) \href{ade1900}
\color{red}
\end{overpic}
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<acquisitions>
</acquisitions>