[done] please merge editions + resolve ISBN issue

[Bas]

First, for the easy part.. ;)

The following two editions are the same, please merge:
https://www.goodreads.com/book/show/3...
https://www.goodreads.com/book/show/2...

information can be found on worldcat:
https://www.worldcat.org/title/twee-k...
publisher: Wolters-Noordhoff
edition: Grote Lijsters
year: 2004
pages: 125
ISBN: 9001558658 9789001558659

Now it becomes a bit complicated, but I hope I can explain and resolve the ISBN conflict described in the Librarian's note for https://www.goodreads.com/book/show/3...

"Grote Lijsters" is a regular release of a set of books (that have been previously published), for educational purposes.
Each book is associated to TWO different ISBN, namely the ISBN for the individual book but there is also an ISBN for the joint set.

ISBN10 9001558623 is for the set release of 2004.
see: https://www.worldcat.org/search?q=900...

This implies that for the "conflicting book"
https://www.goodreads.com/book/show/9...
the *individual book* ISBN should instead be 9001558674/9789001558673
see: https://www.worldcat.org/title/kathys...

[Renske]

Duplicate merged and ISBN edited on the other book. It has been an issue with other years of the 'lijsters' too.

[Bas]

thanks, appreciate that!