Radial velocities and expansion velocities ([O III], [O II], and He II) have been measured for a sample of 64 southern Galactic planetary nebulae. Nebular electronic densities have been derived from the [O II] λλ3727, 3729 doublet for 23 of these objects. These data are compared with previously published values. The distance scale of Dopita and coworkers for Magellanic Cloud planetary nebulae, based on a correlation between observable nebular parameters, is used to derive distances to 33 Galactic nebulae. Nebular ionized masses are calculated for these objects and exhibit a large range from ≡10-3 to ≡0.6 M_sun;.
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Meatheringham et al. (1988) studied this question.