Letters (Perry Rhodan #668)

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Overview:

1974 . Perry Rhodan, #668: Operation Sonnenbaby (1974, various, Pabel-Moewig, DM 1.50, 68 pages, digest, MAGAZINE)
1974 . Perry Rhodan, #434: Das Erbe des Ertrusers (1974, various, Pabel-Moewig, DM 1.50, 68 pages, digest, MAGAZINE)
1974 . Perry Rhodan, #71: Fehlsprung der TIGRIS (1974, various, Pabel-Moewig, DM 1.50, 68 pages, digest, MAGAZINE)