Letters (Perry Rhodan #728)
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Editions/Publications:
- 1975 . Perry Rhodan, #728: Jahrtausendschläfer (1975, various, Pabel-Moewig, DM 1.50, 68 pages, digest, MAGAZINE)
- 1975 . Perry Rhodan, #494: Mond der Gefahren (1975, various, Pabel-Moewig, DM 1.50, 68 pages, digest, MAGAZINE)
- 1975 . Perry Rhodan, #131: Das Versteck in der Zukunft (1975, various, Pabel-Moewig, DM 1.50, 68 pages, digest, MAGAZINE)