Derrière le mur blanc

From Author Wars - https://authorwars.com/publications/derriere-le-mur-blanc-586469.html

Overview:

Title: Derrière le mur blanc
Author: Eddy C. Bertin
Year: 1977
Publisher: Marabout
Price:
Pages: 249+[7]
Binding: Paperback
Type: Collection
Title Reference: Derrière le mur blanc
Notes:
- Possible first printing as per "1977" on last page coherent with catalogue at the end of the book.
- No ISBN ("40-1616-8" on bc).
- No price on book (price category : 5-0 domino).
- Artist not credited (likely Lievens as usual).