D.O.N.A.L.D. (Deutsche Organisation Nichtkommerzieller Anhänger des Lauteren Donaldismus) is an association of people, who care about the duck family and the world they are living in. The association was founded in Germany in 1976, hence the word "Deutsche" in the title. German citizenship is not compulsory to become a member.
The Donaldists are currently publishing a magazine called "Der Donaldist"
(in German) relating all ceremonies held during the donaldistic year and all
the very scientific articles on such problems as "how come that ducks show
sometimes teeth and sometimes not", "genealogy of the duck family",
"where is Duckburg located?", "physics in Duckburg" a.s.o.
One example of a ceremony report, the "Mairennen" as well as one scientific article on the shoe-wear of the ducks that has been published in the #89 issue of "Der Donaldist", are available online. (in German)
A story by Carl Barks, copyright by the Walt Disney Corporation: March of Comics #20, uncensored!!! (in French)
The official D.O.N.A.L.D. page.
Members are splitted in Barks-only people and all the other.
More information on how to become a member can be obtained here