Jippes covers identification request

[Fluks, H.W.]

Now that we're asking help for Inducks: 8-)

On the following site, I show some covers made by Daan Jippes. I suspect
they were made for Gladstone, somewhere between 1986 and 1990. Could someone
who has the comics tell me on which comic they appeared?

The covers are shown on:
http://members.tripod.lycos.nl/bolderbast/covers.html

Thanks in advance.

--Harry.
I.N.D.U.C.K.S. - the Disney comics database
http://here.is/inducks