This issue has variants.
Page 31 is signed by Cockrum and Austin. The author of this story talks about it on his blog, last accessed 2009-12-09 at http://scottedelman.livejournal.com/141966.html . In that entry he says that Tuska originally drew the complete issue, but the last page was pulled, rewritten, and redrawn for reasons that he can no longer remember. He includes a photocopy of the original page, which shows Wonder Man knocking Captain Marvel to the ground (Wonder Man was not on the new page as rewritten and printed).