Erfinder, Erforscher, Entdecker
By: Walter Conrad ; [Bearb., Ewald Oetzel ; Ill., Wolfgang Würfel, Horst Schleef].
Edition: 2., überarb. Aufl. 11.-20. Tsd.
Publisher: Urania-Verlag
Published: 1974
Place of publication: Leipzig, Jena, Berlin
Language: ger
Number of pages: 312
Subjects: Inventions -- History.
Notes: Includes index.