In this story are used three panels from Barksian stories :
The first panel of that story seems to be a melting between the first panels of "Back to Long Ago!" (US 16), and "Land Beneath the Ground!" (US 13) :
This one is from "The invisible Intruder" (W US 44), written by Vic Lockman and drawn by Carl Barks,
and the following one is a redrawing from the first panel of "The Golden Fleecing" (US 12) :
Another story that uses panels from "The Invisible Intruder" is "The Last of the Clan McDuck" (D91308).