“Crisis at the Earth's Core”
Iron Man investigates the collapse of a house and enters the subterranean world.
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Marvel Double Feature #4 (1973) is issue #4 of Marvel's Marvel Double Feature (1973–1977), with a cover date of June 1974. Written by Stan Lee and drawn by Gene Colan and Jack Kirby.
Credits, characters and story details from the Grand Comics Database, CC BY-SA 4.0.