Donald Duck comics by Don Rosa Easter Eggs

I know that the D.U.C.K egg is posted here already, but this post contains so much more eggs by Don Rosa.

D.U.C.K:

D.U.C.K means Dedicated to Unca Carl from Keno (Carl = Carl Barks, the old-timer Donald writer and drawer, who unfortunately is dead... more

After the flood of Xanadu has begun; Donald, Donald's nephews and Scrooge McDuck go to a palace to look for some metal, an old duck led them to the room where the metal is kept. When they still go down the stairs to the room and Scrooge McDuck is too... more

In almost all Donald Duck comics made by Don Rosa you can find the word D.U.C.K.
Most D.U.C.K.s are in the first picture.

D.U.C.K. stands for "Dedicated to Unca Carl From Keno". "Unca Carl" is the well known Disney writer Carl Barks. And "Keno" is... more

In the "comic fortune of the rocks" at page 5 you can see uncle Scrooge using his flashlight, but if you look carefully you can see that Batman is hidden there