Ok here are a few more clips from Four Color 308. I'm not trying to argue either, just note similarities in style. It in no way proves that Carl Barks drew something or not.
http://sites.google.com/site/ddcbart/_/rsrc/1270591907915/cbhm/CBGGA3.jpg
http://sites.google.com/site/ddcbart/_/rsrc/1270591944879/cbhm/CBGGA4.jpg
http://sites.google.com/site/ddcbart/_/rsrc/1270592052682/cbhm/CBGGA5.jpg
And this just might be the only example of "Good Girl Art" in a Walt Disney comic book. I've always loved Carl Barks--the first comic I ever owned was a Walt Disneys Comics and Stories with a Barks reprint bought for 15 cents at the tender age of 8. It was a few years before I found out who the artist was.