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\bibitem{Ahn+dePutter2012} Ahn, C. P. et al, \& de Putter, R. (2012). The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey. \textit{Astrophys. J. Suppl. Ser.}, \textit{203}(2), 21--13pp.

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