Here are some examples of Jim's cover art.

Batman #43 - Batman and Robin versus the Penguin.

Batman #44 - Batman and Robin surrounded by the Joker.

The Brave and the Bold #63 - Supergirl and Wonder Woman.

World's Finest #33 - Superman, Batman and Robin doing gymnastics.

World's Finest #34 - Superman, Batman and Robin in carts.

World's Finest #36 - Batman, Robin and Superman surfing!

World's Finest #39 - Batman, Robin and Superman on parade.