Kirby's co-plot credit is widely acknowledged by Lee and Kirby in numerous interviews. Credit here reads: "Mighty Marvel's Most Masterful Masters of Modern-Day Mythology, Stan (The Man) Lee and Jack (King) Kirby Have Definitely Done it Again!"
Letters from Bernard Cicirello, S. L. Cox, Franklin Roy, Randy Rasmussen, George and Linda Pelley, James Ritchie, and Perry Turner.