This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Paul Halcke Bild. de Stich von Paul Halcke en Image of Paul Halcke slubdresden de Delici Mathematic oder Mathematisches SinnenConfect Schsische Landesbibliothek Staats und Universittsbibliothek Dresden SLUB PDFFaksimile des gesamten Werks Paul Halcke other versions PDold Pages of books about mathematics