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figures/V>1_04970/V>1_04970.png  figures/V>1_1/V>1_1.png  12 vs 13 [3].tex  figures/V>1_2/V>1_2.png  figures/Optically thick, 13, den/Optically thick, 13, den.png  12 vs 13 [4].tex  12 vs 13 [5].tex