Pencils by Jack Kirby. Inks by Joe Sinnott. Words by Stan Lee and Jack Kirby. Letters by Artie Simek. First published in Fantastic Four #76, 1968; printed as a blacklight poster by Third Eye in 1971.
Images via here and here.
The Jack Kirby Museum, a nonprofit, has just raised funds to open a pop-up physical space for one week, beginning November 4, in NYC.