Institution: National Library of Estonia OR Institution: University of Tartu Library OR Institution: University Library of Regensburg OR Institution: University and Regional Library of Tyrol OR Institution: National Library of Technology (Czech Republic) OR Institution: Universitätsbibliothek der Humboldt-Universität zu Berlin OR Institution: The Swiss National Library OR Institution: University Library in Bratislava Region: Riia Author: Häcker, Wilhelm Ferdinand, 1774-1842, Suggested Topics: tehnikakoolid