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Fig. 4.

M/LH versus [Fe/H] for Milky Way globular clusters based on measures of M/LV from McLaughlin & van der Marel (2005) and photometry from Cohen et al. (2007) (left hand panel), and M/LK versus [Fe/H] for M 31 globular clusters from Strader et al. (2011) (right hand panel).
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