Die Geheimnisse des Planeten Syna

From Author Wars - https://authorwars.com/books/die-geheimnisse-des-planeten-syna-2309309.html

Overview:

Title: Die Geheimnisse des Planeten Syna
Author: C. V. Rock
Year: 1975
Type: Short Fiction
Series: Alarm im Weltraum
Number in Series: 2

Editions/Publications:

Unknown. Die Geheimnisse des Planeten Syna (Unknown, C. V. Rock, Engelbert, ISBN-10: 3536011993, DM 5.95, 108 pages, Hardcover, Chapter Book)
Unknown. Sammelband 1 (Unknown, C. V. Rock, Engelbert, ISBN-10: 3536014771, DM 8.80, 222 pages, Hardcover, Collection)