41 sources
Amazing Adventures
The Amazing Spider-Man (vol. 1) #96 (May 1971): "...And Now, the Goblin!"The Avengers (vol. 1) #88 (May 1971): "The Summons of Psyklop"Captain America (vol. 1) #137 (May 1971): "To Stalk the Spider-Man"Creatures on the Loose!Daredevil (vol. 1) #76 (May 1971): "The Deathmarch of El Condor!"Detective ComicsFantastic Four (vol. 1) #110 (May 1971): "One from Four Leaves Three!"Iron Man (vol. 1) #37 (May 1971): "In This Hour of Earthdoom!"Justice League of America (vol. 1) #89 (May 1971): "The Most Dangerous Dreams of All!"Little Lotta in FoodlandThe New Gods (vol. 1) #2 (May 1971): "O'Deadly Darkseid"Savage TalesSgt. Fury and His Howling Commandos (vol. 1) #87 (May 1971): "Dum Dum Does It the Hard Way!"Sub-Mariner (vol. 1) #37 (May 1971): "The Way to Dusty Death!"Thor (vol. 1) #188 (May 1971): "The End of Infinity!"