Wow, this is a busy cover. Lots of captions, balloons and figures. Very well rendered, though. That kind of greyscale knockout colouring often used on secondary characters in covers of the era shows off the linework pretty well.
Inked by Dick Ayers (the original Kirby Checklist listed it as Ditko, and I was about to say that sounded wrong, but checked the update in TJKC #32 and saw it was already corrected there, and on the online listing).