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Fig. 14

Comparison of the ratios between the three isomers of C2H4O2 for the sources listed in Table 8. For G31, the values of MF/AA and AA/GA given in the figure are calculated using the mean value of the observed range 4.3 × 1017−8.4 × 1017cm−2 for AA, while the error bars have been estimated from the entire range.
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