The copy with a white cover (1st?) is a signed/numbered edition of 20.
3rd printing: signed/numbered edition of 20 copies (yellow cover but unsure if all from this printing use same paper stock)
Signed/numbered edition of 23.
The White Buffalo Gazette is the newsletter / zine that took the place of Steve Willis' City Limits Gazette when it was retired (and it was originally inspired by Bruce Chrislip's zine of the same name as well as Clay Geerdes' Comix World newsletter). Several editors have published their own WBG over the years and it generally always contained comics, art, letters and info on new releases.
This issue is from Edward Bolman and Cat Noel's run.
There's one other small drawing I'm unsure of. Chad Woody?