Unverhofft kommt oft

From Author Wars - https://authorwars.com/books/unverhofft-kommt-oft-2091414.html

Overview:

Title: Unverhofft kommt oft
Author: Poul Anderson
Year: 1982
Type: Short Fiction

Editions/Publications:

Unknown. Spion der Erde (Unknown, Poul Anderson, Bastei Lübbe, ISBN-10: 3404231082, DM 10.00, 718 pages, Paperback, Omnibus)
Unknown. Die Flandry Dossiers (Unknown, Poul Anderson, Bastei Lübbe, ISBN-10: 3404211480, DM 4.80, 253 pages, Paperback, Collection)