Légendes du mythe de Cthulhu

From Author Wars - https://authorwars.com/publications/legendes-du-mythe-de-cthulhu-645126.html

Overview:

Title: Légendes du mythe de Cthulhu
Author: August Derleth
Year: 1975
Publisher: France Loisirs
Pages: 214
Binding: Hardcover
Type: Anthology
Title Reference: Ubbo-Sathla
Notes: Unknown printing rank (DL matches, so perhaps 1st). No price on book (BCE). Book is credited to "H. P. Lovecraft and others" (sic). Derleth's credit is listed as "Rassemblées by August Derleth" on the title page. "3570-6002000" on back flap of the dj.