Two of the cover images appear to be re-inked versions of art from panels of interior stories. The image in the bottom right-hand corner of the cover does not correspond to any interior art.
The left side of the cover artwork is a re-inked, re-colored version of the splash page artwork in this story.
The couple on the cover representing the "Henpecked Wife" story seem to be taken from the splash page of this story. The man and woman were pushed closer together to meet the space considerations on the cover and the cover artwork has been re-inked and re-colored. But the images of the man and woman are almost certainly from the same original pencils.