Genre: encyklopedie Language: Czech Suggested Topics: technika Suggested Topics: vynálezy Institution: The Swiss National Library OR Institution: National Library of Estonia OR Institution: National Library of Technology (Czech Republic) OR Institution: National and University Library, Slovenia OR Institution: Universitätsbibliothek der Humboldt-Universität zu Berlin OR Institution: University Library of Regensburg OR Institution: University and Regional Library of Tyrol OR Institution: University Library in Bratislava OR Institution: University of Tartu Library