Hi Solanum,
I assume you are referring in the paper to the short table of bright white dwarfs.
The first column is the WD (or white dwarf) catalogue No for selected stars.
Use that number in the Arizona database here:
http://procyon.lpl.arizona.edu/WD/
And it looks like you will get as much info as you need/want. The pages there are still under construction though! Some catalogue entries seem to load quick and complete others not so.
You could also do a Google search with WD catalog white dwarf star (make sure you use the US spelling of catalog) and it will bring up some other sources that include the WD catalogue.
Regarding some of the positions given,, beware that some are in the J1950.0 epoch, look for and alternate J2000.0 position or be prepared to do some precession calculation!
Hope this is of some help.
Best,
Les D