Fandom — Hobby oder Busineß?

From Author Wars - https://authorwars.com/books/fandom----hobby-oder-business-2171795.html

Overview:

Title: Fandom — Hobby oder Busineß?
Author: Hans-Jürgen Mader
Year: 1982
Type: Essays

Variant Titles:

1982. Fandom — Hobby oder Busineß?