the IONIC routine in IRAF. This routine applies the 5-level atom approximation, assuming the appropriate ionization zone electron temperature, as determined from the oxygen line ratios.

Some abundance determinations require ionization correction factors to account for unobserved ionic species. Here we assume N/O = N$^{+}$/O$^{+}$ [@peimbert69]. [@nava06] have investigated the validity of this assumption. They concluded that although it could be improved upon with modern photoionization models, it is valid to within about 10%. Thus, we employ this assumption, mostly for the purposes of direct comparison with other studies in the literature.

For the 9 objects with multiple regions containing strong \[\] $\lambda$4363, an error weighted average was used to determine a best estimate of relative abundances and oxygen abundances. The results from individual regions are tabulated in Table \[tbl4\] and the mean values, using a weight of $1/\sigma_i^2$ for each component, are listed in Table \[tbl5\]. The uncertainties for these mean values are represented by the standard deviation of the weighted mean or the weighted dispersion, which ever is greater. Calculated errors in this paper provide a statistical estimate only. Additional errors may be important, such as systematic errors due to temperature fluctuations or other imperfect assumptions. However, the 