- Muscheln und Schnecken - Was Ist Was 051 - Walter Hähnel - German (2Replies)
- Unser Körper: Von der Zelle bis zum Menschen - Was Ist Was 050 - Wolfgang Tarnowski, Katrin Tarnowski - German (2Replies)
- Leichtathletik - Was Ist Was 049 - Jan Krebs, Paul Nienhaus - German (2Replies)
- Luft und Wasser - Was Ist Was 048 - Martin Keen, Claire Cooper Cunniff - German (2Replies)
- 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)
- Licht und Farbe - Was Ist Was 017 - Joseph Highland - German (2Replies)
- Planeten und Raumfahrt - Was Ist Was 016 - Harold Joseph Highland, Erich Übelacker - German (2Replies)
- Dinosaurier - Was Ist Was 015 - Darlene Geis, Joachim Oppermann - German (2Replies)
- Versunkene Städte - Was Ist Was 014 - Irving Robbin - German (2Replies)
- Wilde Tiere - Was Ist Was 013 - Martin L. Keen - German (2Replies)
- Mathematik - Was Ist Was 012 - Esther Harris Highland - German (2Replies)
- Hunde - Was Ist Was 011 - Irving Robbin - German (2Replies)
- Fliegerei - Was Ist Was 010 - Harold Joseph Highland - German (2Replies)
- Der Urmensch - Was Ist Was 09 - Donald Barr - German (2Replies)
- Das Mikroskop - Was Ist Was 08 - Martin Keen, Rainer Köthe - German (2Replies)
- Das Wetter - Was Ist Was 07 - George Bonsall, Rainer Crummenerl - German (2Replies)
- Die Sterne - Was Ist Was 06 - Heinz Haber - German (2Replies)
- Entdecker und Ihre Reisen - Was Ist Was 05 - Rainer Köthe - German (2Replies)
- Chemie - Was Ist Was 04 - Martin Keen - German (2Replies)
- Atomenergie - Was Ist Was 03 - Erich Übelacker - German (2Replies)
- Der Mensch - Was Ist Was 02 - Signe Seiler, Rainer Köthe - German (2Replies)