Richie Rich & Casper #6

Harvey Comics brings together two of its most beloved characters in this June 1975 team-up title, with Richie Rich and Casper the Friendly Ghost facing a genuinely puzzling predicament. The cover finds a wide-eyed Richie peering through a stone archway at a crowd of identical men in yellow raincoats — each carrying an "R.R." briefcase — while a concerned Casper floats overhead as Richie exclaims, "I see my dad everywhere, Casper!" The cover text promises that deep in a subterranean lair, the duo will need all their wits to outwit the fiendish mind of Dr. Know, setting up what looks to be a delightfully strange adventure for fans of both characters.