Please add/fix book details

[Abigail]

* The language of the edition is Dutch, not English.
* This edition was published in 1988 (first edition).
* The author, Ben de Graaf, should have the role "Editor in Chief".
* There are three more authors, each with the role "Editor": "Hans Saris", "Theo Vaessen", "Harry Valérien".

[Sandra]

Done.

[Abigail]

Thank you.