- Elektronik - Was Ist Was 047 - Martin Keen, Heinz Bahr - German (2Replies)
- Mechanik - Was Ist Was 046 - Jerome Notkin, Sidney Gulkin - German (2Replies)
- Mineralien und Gesteine - Was Ist Was 045 - Walter Hähnel - German (2Replies)
- Die Bibel – Das Alte Testament - Was Ist Was 044 - Reimar Gilsenbach - German (2Replies)
- Schmetterlinge - Was Ist Was 043 - Ronald N. Rood, Hannelore Kurth-Gilsenbach - German (2Replies)
- Indianer - Was Ist Was 042 - Felix Sutton - German (2Replies)
- Fische - Was Ist Was 041 - Geoffrey Coe - German (2Replies)
- Vögel - Was Ist Was 040 - Robert Mathewson, Heinrich Hoerschelmann - German (2Replies)
- Magnetismus - Was Ist Was 039 - Martin Keen - German (2Replies)
- Prähistorische Säugetiere - Was Ist Was 038 - Martin Keen - German (2Replies)
- Roboter und Elektronengehirne - Was Ist Was 037 - Robert Scharff - German (2Replies)
- Polargebiete - Was Ist Was 036 - Joachim Mallwitz - German (2Replies)
- Erfindungen, die Unsere Welt Veränderten - Was Ist Was 035 - Irvin Robbin - German (2Replies)
- Wüsten - Was Ist Was 034 - Harald Lange - German (2Replies)
- Pilze, Farne und Moose - Was Ist Was 033 - Andreas Zeugner - German (2Replies)
- Meereskunde - Was Ist Was 032 - Robert Scharff - German (2Replies)
- Bäume - Was Ist Was 031 - Geoffrey Coe - German (2Replies)
- Insekten - Was Ist Was 030 - Ronald N. Rood - German (2Replies)
- Berühmte Wissenschaftler - Was Ist Was 029 - Jean Bethell - German (2Replies)
- Die Welt des Schalls - Was Ist Was 028 - Martin Keen - German (2Replies)
- Pferde - Was Ist Was 027 - Margaret Cabell Self - German (2Replies)
- Wilde Blumen - Was Ist Was 026 - Andreas Zeugner - German (2Replies)
- Vom Einbaum zum Atomschiff - Was Ist Was 025 - Arnold Kludas - German (2Replies)
- Elektrizität - Was Ist Was 024 - Jerome J. Notkin, Sidney Gulkin - German (2Replies)
- Von der Höhle bis zum Wolkenkratzer - Was Ist Was 023 - Irving Robbin - German (2Replies)
- Die Zeit - Was Ist Was 022 - Erich Übelacker - German (2Replies)
- Der Mond - Was Ist Was 021 - Erich Übelacker - German (2Replies)
- Reptilien und Amphibien - Was Ist Was 020 - Robert Mathewson, Manfred Niekisch - German (2Replies)
- Wunderwelt der Bienen und Ameisen - Was Ist Was 019 - Alexandra Rigos, Ronald N. Rood - German (2Replies)
- Der Wilde Westen - Was Ist Was 018 - Felix Sutton - German (2Replies)