Frank Herbert's Dune has had more than several printings. How many different versions of cover art have been used in total, to date? Is there a source where they are all shown together?

If it is necessary, it can be restricted to printings in English, but if possible an enumeration of all distinct works of are would be ideal.

It is not necessary to list them all of course, I'm primarily interested in the number itself supported in some way. A link to a source where they can all be seen would be great!

On the left is the one I'd read, on the right is the 1965 first edition hard cover:

Source and Source

Frank Herbert's Dune has had more than several printings. How many different versions of cover art have been used in total, to date? Is there a source where they are all shown together?

If it is necessary, it can be restricted to printings in English, but if possible an enumeration of all distinct works of are would be ideal.

It is not necessary to list them all of course, I'm primarily interested in the number itself supported in some way. A link to a source where they can all be seen would be great!

On the left is the one I'd read, on the right is the 1965 first edition hard cover:

Source and Source