This story uses panels from Barks' "The Money Well" (W US 21) (see Fort Duckburg's page), "The Big Bin on Killmotor Hill" (WDC 135), and "Tralla La" (W US 6).
This one is from "The Big Bin on Killmotor Hill" :
And this one from "Tralla La":
A panel from "The Guardians of the Lost Library" is used in "The
Lost Charts of Columbus" (D
94144).
Panels from "Tralla La" are used in "Last Sled to Dawson"
(AR
113),"Return to Xanadu" (D
90314) and Lo$ 12 : "The Richest Duck in the World" (D
93488), panels from "The Big Bin on Killmotor Hill" are used
in "Cash Flow" (AR
106), and "His Majesty, McDuck" (AR
145), and panels from "The Money Well" are used in "His Majesty,
McDuck" (AR
145), "The Invader of Fort Duckburg" (D
93227) (Fort
Duckburg),"The Richest Duck in the
World" (D
93488), and "W.H.A.D.A.L.O.T.T.A.J.A.R.G.O.N." (D
97052) (Fort
Duckburg).