62 sources
The Adventures of Superman (vol. 1) #478 (May 1991): "Phase Seven: Moon Rocked"
Alpha FlightArmageddon 2001 #1 (May 1991): "Darktime"Black Panther: Panther's Prey #1 (May 1991): "Homes"Captain AmericaChallengers of the Unknown (vol. 2) #3 (May 1991): "Lives of Our Days!"Conan the Barbarian (vol. 1) #244 (May 1991): "Fiends of the Flaming Mountains"DaredevilDarkhawk #3 (May 1991): "Power Play"The Deadly Foes of Spider-Man #1 (May 1991): "Book I: Punishment and Crime"Doctor Strange, Sorcerer Supreme #29 (May 1991): "Blood Will Tell!"Doctor Who Magazine #173 (5 May 1991)Doom Patrol (vol. 2) #44 (May 1991): "Voices"Ghost Rider (vol. 3) #13 (May 1991): "You'll Never See What's Coming Next!"Green Lantern (vol. 3) #12 (May 1991): "The Master Plan"Guardians of the Galaxy (vol. 1) #12 (May 1991): "Nothing Like a Little Overkill"The Incredible Hulk (vol. 2) #381 (May 1991): "Exposition"Justice Society of America (vol. 1) #2 (May 1991): "The Sack of Gotham"The Knights of Pendragon (vol. 1) #11 (May 1991): "Midwinter"Magnus, Robot Fighter (vol. 2) #1 (May 1991): "Protector"Marc Spector: Moon Knight #26 (May 1991): "Scarlet Redemption, Part One: Sinners"Marvel Comics PresentsMonster in My PocketNamor, the Sub-Mariner #14 (May 1991): "A Child Is Waiting"The New Titans #76 (May 1991): "Tower of the Damned!"The New Warriors (vol. 1) #11 (May 1991): "Days of Present Past"Nick Fury, Agent of SHIELD (vol. 3) #23 (May 1991): "Storm Warning"Operation Welcome Home (1991)The Punisher (vol. 2) #48 (May 1991): "The Brattle Gun, Part Two"The Punisher War Journal (vol. 1) #30 (May 1991): "Spin Cycle"Quasar #22 (May 1991): "Prolog IV: A Long Day's Journey into Death"Robin (vol. 1) #5 (May 1991): "The Dark"The Sensational She-Hulk #27 (May 1991): "Game, Set and Match"The Silver Surfer (vol. 3) #49 (May 1991): "Detour"The Simpsons - Season 2, Episode 21 (9 May 1991): "Three Men and a Comic Book"The Spectacular Spider-Man (vol. 1) #176 (May 1991): "The Love of Power"Starman (vol. 1) #34 (May 1991): "Shadow Over Phoenix!"Suicide Squad (vol. 1) #53 (May 1991): "The Dragon's Hoard, Part I: Dead Earnest"Superboy (vol. 2) #16 (May 1991): "Metropolis: City of Tomorrow...Today"Thor (vol. 1) #432 (May 1991): "At Death Do We Part!"The Uncanny X-Men (vol. 1) #276 (May 1991): "Double Death"Wolverine (vol. 2) #39 (May 1991): "Deconstruction"X-Factor (vol. 1) #66 (May 1991): "Endgame Part 2: Heroic Effort"