But the Library does not include the handful of Barks stories that featured non-Disney characters (Porky Pig, Droopy, Barney Bear, etc.) although reprints of those can be found if one searches diligently.
There are A LOT more than a handful of Barks MGM stories. He regularly wrote and drew Barney Bear & Benny Burro stories from 1943-1947(monthly), and also wrote and drew a few Benny Burros in 1943, 3 Happy Hound (Droopy) stories, one Andy Panda, and one Porky Pig.