Un jour, une nuit

From Author Wars - https://authorwars.com/books/un-jour-une-nuit-1751417.html

Overview:

Title: Un jour, une nuit
Author: Luc Vigan
Year: 1965
Type: Short Fiction

Editions/Publications:

Unknown. Fiction, #137 (Unknown, Luc Vigan, OPTA, F2.50, 164 pages, digest, MAGAZINE)