There were only three issues of Jetta, and there are opinions why in the Craig Yoe compilation of all the available Jetta comic book stories, published in 2010. If you click on the link below the story you will go to a DeCarlo story, and my review of Yoe’s book.
For Steve Ditko fans, come back on Sunday for Ditko’s classic Gorgo #1 from 1960.
Click on the thumbnail. I notice that the book is still available from Yoe Books!, but is out of print, and the other links to possible sources I listed in 2010 may not be valid at this time.