Wum, Wam, Wumbo & Wendelin

From Author Wars - https://authorwars.com/books/wum-wam-wumbo--wendelin-3246236.html

Overview:

Title: Wum, Wam, Wumbo & Wendelin
Author: Loriot
Year: 1977
Type: Short Fiction
Series: Wum & Wendelin
Number in Series: 24

Variant Titles:

1977. Wum, Wam, Wumbo & Wendelin