Pulp comics: Hellboy revisited – The Pulp Super-Fan
Zinco Corporation | Hellboy Wiki | Fandom
The Blog of Bob Garlen: Bob Garlen Presents... Mike Mignola's Hellboy - A Netflix Original Series, Pitch and Fancast
Steampunk Sourcebook: Hellboy – Phoebe Darqueling
Steam Community :: :: Super HellBoy
Hellboy Book Club Podcast on Twitter: "The Zinco frog monsters from “The Black Flame,” reappear in the hyperborean machines! We discuss “B.P.R.D. The Warning” on this week's podcast episode! #hellboybookclub #podcast # hellboy #