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Fig. 3
The (g − K) vs. (g − z) 2-colour diagram for the GCs of 12 galaxies combined, excluding NGC 4382 and NGC 4473. The blue and red large symbols correspond to the median colour of the blue and red clusters respectively. The orange lines represent Padova08 SSPs of 2, 3, 6 and 14 Gyr, like in Fig. 1.
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