When did Barks retire?

[Olaf Solstrand]

Uhm... I'm confused. When did Carl Barks retire?

According to Don Rosa:
"But also, Barks retired in 1967, so I can think of $crooge living a nice 
even 100 years."
(from Dan Shane's pages)

According to Daniel van Eijmeren:
"On June 30, 1966, Barks retired and he left the world he created to new 
artists who picked up his style and approach."
(from the DCML pages)

Which is correct?



Olaf the Blue