Above: detail of the initially rejected Wolverton art. ("As you can see, Wolverton carried that idea to the very edge with an image so wild that the Topps executives chose not to print it.") It's now ©1973 Marvel Comics Group.
Basil Wolverton's art and technique: a remembrance by then-editor Bhob Stewart. How a rejected piece of Wolverton art for Topps wound up in Crazy Magazine #1 with text by none other than Harlan Ellison. I love these kind of stories.