\begin{table}%t1
\caption{\label{tab1}Previous spectroscopic binary star investigations.}
%\centering
\small
\begin{tabular}{lccc} 
\hline
\hline
Globular cluster ID             & Number target & Number binary     & Reference  	\\ 
\hline
M3			      &  111  &  0  &   Gunn \& Griffin (\cite{Gunn79})\\
M3			      &  111  &  1  &   Pryor et~al.	(\cite{Pryo88})\\
47 Tuc, M2, M3, M12, M13, M71 			      &  393  &  6  &   Pryor et~al.    (\cite{Pryo89})\\
NGC 3201		      &  276  &  2  &	C\^ot\'e et~al.     (\cite{Cote94}) \\
NGC 5053		      &   66  &  6  &   Yan \& Choen    (\cite{Yan96})\\
M71			      &	 121  &	12  &	Barden et~al.   (\cite{Bard96})\\
M22			      &  109  &  1  &	C\^ot\'e et~al.     (\cite{Cote96et})\\
M4			      &	  33  &	 2  &	C\^ot\'e et~al.     (\cite{Cote96et})\\
Pal 5			      &	  18  &	 1  &	Odenkirchen et~al. (\cite{Oden02})\\
NGC 6752		      &	  51  &	 0  &	Moni Bidin et~al. (\cite{Moni06})\\
\hline
\end{tabular}
\end{table}