thor138The Mhty Thor #138, March 1967, Marvel Comics writer: Stan Lee penciller: Jack Kirby inker: Vince Colletta letterer: Artie Simek I've said it before, and I'll say it again: whenThor has returned to Earth to rescue Sif from the clutches of Ulik. To search for his foe unnoticed, Thor taps his hammer and changes back into the mortal form of Donald Blake, playing