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'''Hellboy'''
'''1993'''
* ''San Diego Comic Con Comics'' #2 (August 1993), includes "[[Hellboy#San Diego Comic-Con Comics|Mike Mignola's ''Hellboy'']]" by Mike Mignola and [[John Byrne (comics)|John Byrne]].
'''1994'''
* [[Hellboy#Comics Buyer's Guide|Mike Mignola's ''Hellboy: World's Greatest Paranormal Investigator'']] (promo insert, May 20, 1994) by Mike Mignola and John Byrne.
* ''[[Dark Horse Presents]]'' #88–91 (August–November 1994), includes "The Wolves of Saint August" by Mike Mignola.
* ''Celebrate Diversity (Collector's Edition)'' (catalog supplement, October 1994), includes [[Hellboy#Celebrate Diversity|"Hi, My Name Is Hellboy"]], an ad by Mike Mignola.
'''1995'''
* ''[[Dark Horse Presents|Dark Horse Presents 100]]'' #2 (August 1995), includes "The Chained Coffin" by Mike Mignola.
'''1998'''
* ''[[Abe Sapien: Drums of the Dead]]'' (one-shot, March 1998) by Brian McDonald, and [[Derek Thompson (comics)|Derek Thompson]], includes "Heads" by Mike Mignola.
* ''[[Hellboy: The Chained Coffin and Others]]'' (TPB, August 1998, {{ISBN|9781569713495}}), includes "The Baba Yaga" by Mike Mignola.
* ''[[Dark Horse Presents|Dark Horse Presents 1998 Annual]]'', includes "The Right Hand of Doom" by Mike Mignola.
'''1999'''
* ''Dark Horse Extra'' #14–19 (August 1999 – January 2000), includes "The Vârcolac" by Mike Mignola.
* ''Gary Gianni's The Monster Men'' (one-shot, August 1999), includes "[[Hellboy: The Right Hand of Doom#Goodbye, Mister Tod|Goodbye, Mister Tod]]" by Mike Mignola.
* ''[[Dark Horse Presents|Dark Horse Presents Annual 1999]]'', includes "Pancakes" by Mike Mignola.
'''2000'''
* ''[[Dark Horse Presents]]'' #151 (February 2000), includes "[[Hellboy: The Right Hand of Doom#The Nature of the Beast|The Nature of the Beast]]" by Mike Mignola.
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