In this story, Don Rosa mainly put references to "Back to the Klondike" (OS 456), "North of the Yukon" (W US 59), with a little bit of "Only a Poor Old Man" (OS 386).
This panel, also used in "The Richest Duck in the World" (D 93488), is from "Tralla La" (W US 6) :
Then, that panel is a redrawing from "Nobody is Sending Fool" (1974), an oil painting inspired by a panel from "Only a Poor Old Man"...but Scrooge's hat is not the same...
This is panel has been taken from "Back to the Klondike". Between the two stories, the Black Jack Saloon has been renovated :
Then, a panel from "Only a Poor Old Duck" has been used for the last panel (look in the first cloud) :
Some panels from "Last Sled to Dawson" are used again by Don
Rosa in "The Billionaire Of Dismal Downs" (D
93121).
Panels from "Back to the Klondike" are used in "Hearts Of
The Yukon" (D
95044) and in "The Coin" (F
PM 99001). Panels from "North of the Yukon" are used in "The
Billionaire Of Dismal Downs" (D
93121). Panels from "Only a Poor Old Man" are used in "Cash
Flow" (AR
106), "The King Of The Copper Hill" (D
92083), "The Billionaire Of Dismal Downs" (D
93121), "The Empire-Builder from Calisota" (D
93288), and "The Richest Duck in the World" (D
93488). Other panels from "Tralla La" are used in "Return
to Xanadu" (D
90314), "The Guardians of the Lost Library" (D
92380), and "The Richest Duck in the World" (D
93488).