Comparison of our A_V values for fixed R_V = 3.1 to the literature values. Top: when all three progressions could be used to infer the mean A_V, the stars are represented by red dots, and when two progressions could be used, they are shown with black dots (progression [0,1] omitted). The black line indicates identity. The four stars with literature values of A_V=0.0 mag are offset by 0.02 mag for clarity of their error bars. Bottom: same as above, but color-coded with the disk inclination. The dashed gray lines indicate errors of 0.2 mag.