Line art is the same as cover to Four Color (Dell, 1942 series) #318, but a different colorist was used.
The inside front cover and inside back cover are blank.
Bolivar is named Bornworthy. It's thought that the editors of the Donald Duck strip thought that the dog being named Bolivar would be seen as a slight against Simon Bolivar, a Venezuelan patriot of the time. For a while, Bolivar's name was changed to "Bornworthy," though later strips reverted his name to Bolivar (with the occasional nickname of "Bernie").
This is a reprint of the official first appearance of the Junior Woodchucks from Walt Disney's Comics and Stories (Dell, 1940 series) v11 #5 (125), but the origins of the group can be traced back to the shorts, Good Scouts (1938) and Sea Scouts (1939), both written by Carl Barks.